Have you been able to access the router configuration from your browser (
http://192.168.1.1)
What have you tried to do so far.
Do you have windows setup to automatically detect the IP?
Goto Start --> run --> type "cmd" and then type "ipconfig /all"
You should see an IP that is something like 192.168.1.100 and the default gateway should be 192.168.1.1 (assuming you havent changed the IP of the router)
The more info you give us the more we can try and help
Edit---
ops guess im way too slow