XP Home edition and Wireless

I have a Linksys Wireless network setup and working fine. I am trying to add an additional PC running XP home ed. I can Manage the router and obtain an IP address. I can not ping outside of the router. When I scan for networks it finds two of them, both with good signal strength. I have WEP enabled and the key is correct. When I do IPconfig/all I show a valid IP and gateway. Any Ideas