The apartment complex I'm living in while attending college is doing this deal with wireless internet, in which we get high speed wifi for $15 a month. It's quite a bargain, considering Cox Communications charges at least $40 for high speed internet. My problem is this: I have not been able to pick up the signal on my Airport Extreme equipped 12" PowerBook G4. Other Mac users in my area are able to get the signal, but I can't. Yes, I have paid for the service and submitted my Airport Extreme's MAC (IP) address. I had a guy from the computer shop that set up the network come and take a look at my computer. He tried to "find" the network, but discovered that my Mac had options to receive either a 40-bit or 128-bit signal. He said that the signal the towers/antenna's were broadcasting is in 64-bit protocol. When I take my laptop to school to get online wirelessly, it works fine. All my Airport software is completely up to date. My Airport is fully functional elsewhere (at school). I own an Airport Express and even with that plugged in I have not been able to pick up a signal. Needless to say, help!