Vista - Router misbehaving after move

Hi,

I have just moved house and had my roadrunner service transferred, and my linksys WRT54GL can't see the network any longer. It worked perfectly before, and if I plug a computer into the cable modem directly, there's no problem. But with the router plugged into the modem, I have local access only to other pcs on my home network and none of them have access to the internet.

I've checked the obvious things, cables being hooked up to their correct slots etc and rebooting everything but nothing has worked.

In the router's control panel, there is no connection listed. I've tried releasing and renewing to no avail.

Does anyone have any idea what the problem could be? It's a big frustration to not be able to have more than one computer connected to the network at any one time.