The only problem I could think of is its not getting an IP address, I have this problem on my PC when I'm in Xubuntu 8.04, connects fine but cannot get an IP address and won't load anything. Load up the TCP/IP Control Panel and Try entering the IP address of the router into the "DHCP Client ID" field, if you do not have a field like this make sure you select "Using DHCP Server" in the "Configure:" drop down menu.