i have an imac running OS 9.1. i have dsl service with sbc using a speedstream 5100 modem. i'm using a linksys wrt54g v5 router. i've created a wireless connection to a pc laptop. the imac is directly connected to the router. however the imac can't read the signal from the router. can anyone help me? all the relevant lights on the modem and router are green.