sorry i didn't get it well, can you access to the router setup web page!?
what happened is that you need to use keys those used by the pc's for the wireless network.
if you can access to the router setup web page,
try to allocate some keys(as far as i know)you can put no more than 4 keys.
there should be an option to generate some keys,but if not try this key:
then,go to your network connection in windows,open the software that deals with you wirless connection, in the security option,you'll find ways to put the key.
enter the same key that the router use.
and that should work.