I'm trying to set up my grandson's Mac Book Pro to wirelessly access a Cannon printer connected to the family Airport Extreme through a USB port. I can see the printer and print to it wirelessly from his mother's Mac Book Pro. I've tried plugging the printer directly into his machine and then re-connecting it to the Airport but I still can't see it. I have printer sharing selected on both Mac Books. Any suggestions as to what I am doing wrong? I suspect I have something miss set somewhere. Both machines are running Leopard and are up to date. The only thing different is that I have him on the guest network rather than the primary network. I can't imagine however, that that would keep him from seeing the printer. Any help will be greatly appreciated. Ken