Wireless Problems – Please help!

Hello, I have a wireless network that is giving me some problems. They had an interruption in their comcast service and the wireless has not been working since. They are using a comcast broadband connection and have about 3 nodes on the network, among which 1 is physically wired through the router. That one is working fine. I am getting solid link lights on both the modem and the router. I am getting full connection messages, however I am unable to connect to web site via IE7. I have power cycled both the router and modem. It was giving me messages that it cannot properly configure the ip address, and terminates there when I repair the connection. All machines are XP with an Arris modem and RCA wireless router.