If something has gone wrong with the router's initialization, you may need to do a factory reset and reconfigure it. That would be my first step.
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\asdf>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : asdf-84fdbd43d
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Wireless Network Connection 8:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : RT2500 USB Wireless LAN Card #4
Physical Address. . . . . . . . . : 00-06-F4-0D-3A-AD
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.4
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 166.102.165.11
166.102.165.13
Lease Obtained. . . . . . . . . . : Sunday, December 17, 2006 10:44:58 A
M
Lease Expires . . . . . . . . . . : Wednesday, December 20, 2006 10:44:5
8 AM