Can't Connect To The Internet Or Wired Router

Just did a clean windows 7 x64 installation on a build a box computer with a new hard drive. Install went fine. Plugged it in to my 3 month old Linksys Wireless G Broadband Router (WRT54GL) and it doesn't recognize that there is any connection at all. Windows says "No connections are available" and troubleshooting can't identify the problem. The light on the router and on the computer comes on. I am running a wired connected XP computer and 2 Win 7 x32 wireless connected computers just fine. Ran ipconfig /all and it came up as follows:

Host Name.................... : Bottomdweller-PC
Primary DNS suffix.......... :
Node Type ....................: Hybrid

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All wires are connected. I've tried booting in Safe mode with networking. I've even connected the computer directly to the cablevision modem. I've installed a USB Linksys wireless adapter and although it installs fine, it doesn't see the router at all. I've also tried reinstalling the router directly on this computer but it doesn't see the router at all.

I've tried setting up a new connection or network, Connecting to a network and choosing a homegroup and sharing option but since you need a network to connect to first I couldn't do it.