Why doesn't wireless scanning work if initiated from the PC or from the MF212w printer?

yes
you have to check and adjust compatibility and have the correct driver installed

To secure your wireless network from unauthorized access,please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

Did you turn off Dynamic addressing on the 2nd router?

I had the same issue with Windows 7 64 bit.I managed to solve it by doing the following
1. Locate the scan2pc.exe program in C:\Windows\twain_32\Samsung\CLX3170 2. Right-click/properties - Compatibility tab. 3.Set compatibility to win xp. Set "Run as Administrator"
I also added the scan2pc.exe to the firewall allowed programs (did that for scanmgr.exe as well, but I don't think I needed to).
Works great now!
Good luck!!

i think its working.Connect the ethernet port of moden to wlan of wireless

Your router is not setup right. Take your cable from your modem and plug into the lan port of the router. That will make it work fine.

Are you using a router? If you are using a modem and it is not wireless then it will not work.

I have dlink 2100ap wireless router any body had access my wireless network but i want to ristrect network just like network passkey how can i give my dlink 2100ap wireless router pass key please give me reply

Double check your physical connection. It should be this way

Modem > connected to Internet Port of the router
PC > connected to port 1
Laptop > can be wireless

Now you must power cycle your router and modem. Turn off router first then modem. Wait for 30 seconds. Power on modem first, then the router. You must configure the wireless settings on your laptop it doesn't connect automatically.

To access your router you should goto http://192.168.0.1 - It should explain in the manual.

You may have to set the router in Cable Modem mode as it may be in DSL mode now.

I hope this may help.

ALSO! There should be a little hole in the back that you can put the tip of a pen into to press a button and it will reset the router back to factor defaults. Default settings would be cable modem mode. Be sure to have the router powered on and press the button down for 10 secs and notice the lights on the router should flash. After that power down the router, by unplugging the power and the plug it back in. It should be set back to factory defaults.