Here's something that hasn't been mentioned before..... make sure both support the same security setting and that you are transmitting the wireless signal from the router in "Mixed" mode or in wireless G or B mode. What wireless cards are they? Not to be a bitch but can this also be moved to the Computer Support forum? IT is kinda dead over there.... it needs some action .
i installed the last router's firmware and it SEEMS so far to be working! i'll test some other days and i pray everything will be fine!