I'm working/upgrading a system I built around 3 years ago. Put in a larger HDD to start, and newly installed Windows XP Pro SP2. I've tried 3 different Wireless Network cards and I have the same trouble each time, I'm sure it's not the cards... It sees my router, and I get a great signal, but I'm unable to connect to the Internet and such.

When I run ipconfig, this is what it shows and doesn't show.
Connection - specific DNS Suffix: (not showing)
Auto configuration IP Address: (shows)
Subnet Mask: (shows)
Default Gateway: (not showing)

No help if I release or renew. I really don't know much about networking, but always seem to figure it out. I'm unable to figure this one out. Please help!!!