Try specifying an IP address for the NIC. goto start - control panel - network connection - rt-click your lan connection - select tcp/ip - properties - manually enter ip, and enter 192.168.0.1. You don't need anything else entered.
Let us know if that works.
2500+ Barton 191x12@1.85v=2293mhz
Tr SLK-800
Tt Smartfan II
A7N8X Dlx
2x512MB Corsair PC3200
BBA 9700 Pro AIW
2x80GB 7200RPM Maxtor
Guillemot Game Theatre XP