like i said already ,
clone the routers MAC on the PC lan card , get that MAC working there as a direct connection , then plug your router back in and see if the WAN is now filled in on its internal web page and you can ping a site off the router.
dont forget to clear the PC lan card of the
cloned routers MAC and reset everything after, it should then be fine......
this rebol script might be useful for telling you the current WAN/LAN
http://www.cableforum.co.uk/board/34265059-post10.html