I have a PowerMac G5 and an ibook G4. I installed airport extreme cards on both. Also purchased an airport express. When I first installed it, it seemed to work OK. Dropped the signal every couple of days and I would have to reset the cable modem and begin over. (incidently, I am a complete novice at the wireless/airport stuff) Now, I can't seem to even get a signal from the modem to the express. I have talked to the cable people numerous times and every check they do on the modem says OK. In fact, if I hook it up direct to either computer it works great. When I hook up the express, I can never get a green light, no matter what I do. I have reset it, and the cable people are no help, in fact they lectured me about how they can't be responsible for a network they didn't set up and how I should pay them to come and do the set up for me. RIGHT! Am I doing something wrong? Can someone walk me through the process? Is it possible that the express is bad??? I have only had it about a month. Is there a way to check it?? Any help will be greatly appreciated!!!