my rooter's IP is 192.168.1.254. you have to check your manual to see the original setting. and then use iexplorer to connect http://192.168.1.254 ( ip of rooter) with cable. Settgin WEP with HEX, i.e combination of 0~9 and a~f.
when it done, use Wireless card (USB as well) and set same HEX.