I have a Belkin G Mimo router and I'm trying to connect an Xbox wireless network adapter which keeps getting stuck at the first stage of checking the network. I used to have an Ethernet connection which worked but is now not working. Any ideas/help would be appreciated.

Here is a great tutorial to Connect and troubleshhot your Xbox to a wireless network.
If you need more help post back! Thumbs and testimonial are welcome!

As MIMO is compatible with all wireless g products there shouldn't be any issues at all....
so some questions:

• do you have other wireless devices working with the router? if so can you duplicate their settings for this n/w card?
• have you set security on the router?
• what are you using to connect to the network the windows interface (assuming it's PC not MAC based) or the Belkin one?

i have a linksys g n/w card attached to my MIMO router & it's fine so I'm sure that this is solvable!

Reinstall the computer operating system and then install the adapter drivers.

There must be security on the wireless network and you might be typing the wrong password of the wireless network .
Or your computer is not getting IP address from the router.
First Check the wireless network key or the passphrse.
Click Here for more info about networking

Check for the wireless encryption settings associated with this. If you're trying to join a network with "Open" settings to a encrypted network it won't work very well.

are you typing the correct upper or lower case and not confusing zeros with the letter 'O'

You connect the adapter to your Xbox 360

http://www.nintendo.com/consumer/wfc/en_na/ds/wrSetupHelp.jsp

when enabling wireless security the router and adapter must be both be configured and configured in a fashion that both support. If you need help provide confirmation of your wireless router's manufacturer and model and the same information for any wireless adapters or computers with built-in wireless adapters to be wirelessly connected.

This will allow us to determine the common security options for all wireless devices you have.

It sounds like the router address is wrong or you are not connected to the network.. Guessing you are using Windows XP or Vista. Go to the DOS prompt (http://www.computerhope.com/issues/chdos.htm) then type ipconfig. This will bring up details on your network (see example below).

IPv4 Address. . . . . . . . . . . : 192.168.0.4
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1


You should see default gateway address which is the address of your router ie 192.168.2.1 in your example. If this is not shown you have not connected to your router properly. If it shows a different address use the address shown to try and access your router. HTH