Another problem... wireless router All...

I have intalled hundreds of linksys routers, so when I heard such a problem described above, I though it would be just a system error due to the OS messed up. but with the new router WRT160N, I actually had that problem. they raised security level (especially for WEP), but the router doesn't have options for it in configuration. so, we will have to set our computers manually to make work with it.
Do manual setup by typing SSID, Security mode, Key.... and make sure to disable 802.11x security.

can you connect without the security???
if so. configure the router with minimum security. if that is good than go up.
you need to clean out the setting on the laptop first.
delete all of the network that the laptop can find. do a fresh search. click on the router you want ot connect. if you setup the WEP. it will ask for a pass key type in the key exactly as you have on the router (case senstive).

let me know if you need addtional info.