Help please!!!! this is a problem that seemingly developed from out of nowhere. i have a mac, uptodate and new in every where, and a windows/xppro machine that is likewise. i have an apple wireless network: extreme and express, wds, dsl to the extreme... i get this error message on my mac when my pc tries to get on the wireless network. and then neither computer can access the internet. when i disconnect the network from my pc, all is fine! what happened!??!?! how can i fix this?!?!?! PLEASE HELP! thanks, r.