Nintendo ds I cant seem to connect to my router, something about ds not liking wpa or something, what can i do?

Try changing your WiFi encription to WEP or no security, this should be available on your cablemodem/router web internface (need a user and password for that) under the Wireless/Security option.

DS Lite is not compatible with any other WiFi encription for online gaming: "Important note about the Nintendo DSi and WPA security: While the Nintendo DSi is compatible with WPA security, Nintendo DS games with online play still require the use of WEP or no security to connect with the Nintendo WFC. Therefore, your connection settings for using these games must be set up on slots 1-3. If you need more details on using your adjusting your router's settings,click here and select your router (if available).

1. At the Setup screen, tap "Nintendo Wi-Fi Connection Settings."
   
2. Tap "Connection 1 None."
   (Don't see "None" for Connection 1? To ensure any existing settings don't interfere with getting connected, tap the button, then choose "Clear Settings.")
3. Click on "Search for an Access Point."
   
4. The Nintendo DS will search for any wireless networks within range. Once it is finished searching, it will display the names of all the wireless networks it finds.

Once you have done this you may find next to your wi-fi, a lock this is what they mean:

No security - Your wireless network is unlocked.

1. Tap on your network name to select it.

1. Select "OK," "Save Settings," and then "Yes." The Nintendo DS will run a connection test with your wireless router.

• The connection test was successful - Your Nintendo DS is now connected online and you can enjoy the Nintendo Wi-Fi Connection features of the game!
• The connection test was not successful - If the test was not successful, you will receive an error code.
  
  • Error Code 51300: This means the security code or network name entered into the Nintendo DS is not the same one the router is set to. To reach your connection settings, click "back" on the error code screen. Make sure to pay extra attention to the security key you find in your router's settings and enter it exactly as it appears (the key is case sensitive).
  • All other error codes: Try our error code lookup where we have detailed information on many common error codes.

WEP security - Your wireless network is secured with WEP and requires a security key.

1. Enter your router's WEP key into the Nintendo DS Don't know your router's security key? Let us help you find your router's security key. Select the brand of your router below and we'll provide you with the default information for that brand! Linksys Netgear DLink Belkin Apple 2Wire All other brands Enter your WEP keyOn the upper screen you will be informed that "A security key is needed to connect to this access point." Enter your security key by tapping the empty field, and select "OK" when finished.
   

1. Select "OK," "Save Settings," and then "Yes." The Nintendo DS will run a connection test with your wireless router.

• The connection test was successful - Your Nintendo DS is now connected online and you can enjoy the Nintendo Wi-Fi Connection features of the game!
• The connection test was not successful - If the test was not successful, you will receive an error code.
  
  • Error Code 51300: This means the security code or network name entered into the Nintendo DS is not the same one the router is set to. To reach your connection settings, click "back" on the error code screen. Make sure to pay extra attention to the security key you find in your router's settings and enter it exactly as it appears (the key is case sensitive).
  • All other error codes: Try our error code lookup where we have detailed information on many common error codes.

WPA security - Your wireless network is secured with WPA and requires a security key.
The Nintendo DS and Nintendo DS Lite are not compatible with WPA security. If you would still like to connect your Nintendo DS online, you will need to either change your router's security to WEP, or disable security entirely. Please note that any changes you make will affect other devices that connect wirelessly to your router.

This means you've got a WPA/2 security connection on your router/access point, whereas the Nintendo DS only supports WEP or open encryption.
You can:
1) change your security from WPA to WEP on your router
2) Purchase a used nintendo wifi stick
3) Set up a second router or access point with WEP security specifically for your DS

Unable to use your wireless signal
Likely cause: It appears that the settings entered into the Nintendo DS are not compatible, or the router's broadcast settings should be changed.
How to fix: Try creating a new connection with your system. Nintendo DSi owners trying to play multiplayer games will want to be sure to read the "Trying to play online multiplayer with Nintendo DSi."

1. Create a new connection: This error can occur if a setting (like your network's name) has changed since you last connected. If it's been awhile since you connected, or if this is your first time connecting, creating a new connection file will often resolve this error code. Click the button below for your system and we'll walk you through the connection step-by-step.

Trying to play online multiplayer with Nintendo DSi
Even if you are able to connect online and use other online features of the Nintendo DSi, if you are attempting to play multiplayer games but are receiving error code 51099 when you try and connect, then your router is likely using a security type - WPA - that is not compatible with Nintendo DS Game Cards.
Try this:
If you are sure you are using WPA, click here for more information including alternative connection methods. If you're not sure if you're using WPA, you can find out by going into the connection settings on your Nintendo DSi and doing a search for an access point. Follow these steps:

1. Turn on your Nintendo DSi and access the System Settings by clicking on the wrench icon

2- Scroll over to the third page, and select "Internet."

3-Now choose "Connection Settings."

4-Click on "None" for "Connection 1."
5-Click on "Search for an Access Point."

6-The Nintendo DSi will search for any wireless networks within range. Once it is finished searching, it will display the names of all the wireless networks it finds. Look for your wireless network.

7-What to do next will depend on the "lock" icon you see next to your network on the Nintendo DSi.


No security - This connection type is compatible with Nintendo DS Game Card online multiplayer.

WEP - This connection type is compatible with Nintendo DS Game Card online multiplayer.

WPA - This connection type is not compatible with Nintendo DS Game Card online multiplayer. Security will need to be changed to WEP or turned off in order to play online. Click here for more info.

Other suggestions :

Make sure your router is set to broadcast in "b" or "mixed" mode. If your wireless router is transmitting in "N" only mode, you will need to switch it to "b/g" or "mixed" mode. For help accessing your router's settings, click here and select your router brand and model (if available). Most routers will have this setting in the "broadcast settings" menu.

• Check for wireless interference, which can affect the signal strength to the Nintendo DS. To help minimize wireless interference, try the following:
  • Make sure other wireless devices such as cordless phones or wireless speakers are turned off, and that the Nintendo DS is an open area without objects or electronics blocking the signal.
  • Change your router's channel setting to 1 or 11. By default, most routers broadcast on channel 6, which overlaps with other channels and may be weaker. For help doing this, click here and select your router brand and model (if available). The information you need is found in the "Broadcast Channel:" area.

Still stuck? We can help! We have found that simply erasing the old connection file and creating a new connection to your router may help. Click the button below for a step-by-step guide. If at the end you still need help, you'll find contact information to reach our specially-trained representatives. Click the button below for your system and we'll walk you through the connection step-by-step.

Nintendo DS handhelds will not work with WPA wireless encryption, only with WEP, or with unprotected wifi networks (not advised).
Check your router settings to see if they conform with the encryption allowed with the DS.

WPA and WPA2 are not supported by the DS Lite, only WEP and unencrypted wifi connections are. There is no known way at the moment to make the DS Lite support WPA of any form so your only three options are to go to WEP encryption, use no encryption (not recommended), or set up an adhoc connection on a computer with that is connected to your router that has internet connection sharing enabled.

It appears that the settings entered into the Nintendo DS are not compatible, or the router's broadcast settings should be changed.
How to fix: Try creating a new connection with your system.

Create a new connection: This error can occur if a setting (like your network's name) has changed since you last connected. If it's been awhile since you connected, or if this is your first time connecting, creating a new connection file will often resolve this error code. Click the button below for your system and we'll walk you through the connection step-by-step.



Trying to play online multiplayer with Nintendo DSi
Even if you are able to connect online and use other online features of the Nintendo DSi, if you are attempting to play multiplayer games but are receiving error code 51099 when you try and connect, then your router is likely using a security type - WPA - that is not compatible with Nintendo DS Game Cards.
Try this:
If you are sure you are using WPA, click here for more information including alternative connection methods. If you're not sure if you're using WPA, you can find out by going into the connection settings on your Nintendo DSi and doing a search for an access point. Follow these steps:
Turn on your Nintendo DSi and access the System Settings by clicking on the wrench icon.

Scroll over to the third page, and select "Internet."

Now choose "Connection Settings."

Click on "None" for "Connection 1."

Click on "Search for an Access Point."

The Nintendo DSi will search for any wireless networks within range. Once it is finished searching, it will display the names of all the wireless networks it finds.
Look for your wireless network.
What to do next will depend on the "lock" icon you see next to your network on the Nintendo DSi.

No security - This connection type is compatible with Nintendo DS Game Card online multiplayer.

WEP - This connection type is compatible with Nintendo DS Game Card online multiplayer.

WPA - This connection type is not compatible with Nintendo DS Game Card online multiplayer. Security will need to be changed to WEP or turned off in order to play online. Click here for more info.

Other suggestions:
Make sure your router is set to broadcast in "b" or "mixed" mode. If your wireless router is transmitting in "N" only mode, you will need to switch it to "b/g" or "mixed" mode. For help accessing your router's settings, click here and select your router brand and model (if available). Most routers will have this setting in the "broadcast settings" menu.
Check for wireless interference, which can affect the signal strength to the Nintendo DS. To help minimize wireless interference, try the following:
Make sure other wireless devices such as cordless phones or wireless speakers are turned off, and that the Nintendo DS is an open area without objects or electronics blocking the signal.
Change your router's channel setting to 1 or 11. By default, most routers broadcast on channel 6, which overlaps with other channels and may be weaker. For help doing this, click here and select your router brand and model (if available). The information you need is found in the "Broadcast Channel:" area.

this means you are using a newer form of wifi security

• Note: WEP Security is the only option for multiplayer gaming on any of the Nintendo DS systems.
  WEP - If you wish to secure your wireless network, the Nintendo DS and Nintendo DS Lite are only compatible with WEP (Wired Encryption Protocol).
  WPA - The Nintendo DSi, Nintendo DSi XL, and Wii are compatible with both WEP and WPA security.
  


• Known Compatibility Issues - Most wireless routers are compatible with the Wii console and Nintendo DS systems. However, our experience has shown the following devices may be incompatible:

ensure that your wireless router is not using wpa protection. If it is go into your router and change the wpa security to wep and you will have no problem connection.
If you need further assistance please feel free to follow up with a comment and i will be here to assist you. If this assisted you please feel free to rate the solution. thanks and have a great day.

more then likely the wireless router will work with the DS. You'll just need to make sure you enter the settings exactly. You should just be able to put a wpa-psk key in your wireless router and on the DS.
In the computer world just because something isn't supported, doesn't mean it won't work. It just means the manufacturer won't help you make it work.

The DS can only connect to unsecured wireless or wireless with WEP security. If your router is using WPA, the DS can not connect to it. I heard the DSi can use WPA but I have not confirmed that yet.

Note, I do not recommend unsecuring your wireless or using WEP. If you must use the DS wirelessly, it may be better to get a nintendo dongle/USB stick or another wireless router that you can lock down to prevent unauthorized access to your primary network.