Wireless conncetion

Hello,
I have a linksys wireless router connected to my desktop main comp downstairs which work perfectly find. I try to connect another desktop to the network using a Netgear wireless-G USB 2.0 adpter. Everything works fine and I am connected to the neckwork with a strong signal. I try to use a browser, or anything that requires internet, it says the explore cannot display page. The main comp downstairs can access the internet, and my wireless comp can access other unsecure networks and use them fine.. I called Netgear help desk and they said I need to get the Linksys Router Settings model #wrt54gp2. My problem is that I do not know how to get this setting. Hos do I correct this? Please help!

Thanks!
Configuration: Vista Home Basic
Internet Explorer 7.0