Wireless internet connection issues...

Have a G5 IMAC with an Airport Extreme wireless card. I've always used wireless on this computer with no problems. However I recently moved and I am having trouble picking up the wireless router. It gets 2 bars of a signal and the internet times out whenever I try to use it. Tried moving the router as close as I could and nothing. (it's a Netscape router I believe) My room mate's powerbook picks it up even from where my computer is no problem. Any way I can boost the signal from the computer or any settings I can dink around with? Thanks

There must be interference of some kind, keep trying different locations for the router. If it becomes a major problem, look into replacing your wireless card. It isn't the router because it sounds like your roommate's computer can pick it with ease.