Like rob said try and configure the router by a cat 5 cable.
I would resent the router plug the labtop is conected via a hard wire, open IE and type "routerlogin" this will bring you to the configeration. Make sure the wierless is active and you have no encription to start. Also you may want to check to see what speed your router is b;g;a and make shure your wierless card can handel it. Most routers and cards are backwards compatable, but you never know. I know in a netgear router you can also tell it to onlly sent out one signal again b;g;a.
Were here to help,
mcf747