1. The firmware on the router is not the latest.
2. The router is not configured for use with your ISP. I can't do this for you as I don't know your ISP particulars.
I tried to install an new Linksys WCG200 cable modem/wireless router combo unit last night with no success. I had the Optimum support folks change the mac address of the cable modem. I am running WinXP on an IBM NetVista desktop. The cable light on the modem never lit... Had connection from PC to router.. port 1 light lit. Powered off and on PC, I got back on with Optimum support to confirm the mac address and it was accurate. The support team said it should work. I am wondering if the Mac address change can take that quick(10min)? Also looking for any help. I had them go back to my original modem mac add and it works fine. Tried Linksys support and got passed to level 2, no progress made... Any help would be appreciated.