You may need to connect to the router wired, to log on to it and set up your wireless settings. You'll set up a wireless network name, enable DHCP, and select your internet connection types, setup your WEP (Encryption) so no one else can "tap" into your network, etc.. etc..
Then unhook the wire and configure your laptop to the same network name, enable DHCP, and put in your WEP password. THEN hopefully it'll find the router.. good luck!