I had a similar problem when I first purchased the ipronto. I had three computers on my network. When more than one computer was running (and the ipronto was in the loop), the whole system would get unstable and eventually (sometimes every couple of days other times every few hours) the router would just give up. Finally resorted to using direct ethernet cable from the router to one computer which was nearby AND also replaced the Philips PC card with a Netblaster PC card to reduce the frequency of the problem. Then, I purchased an 802.11a/b/g router. Of course, the Philips PC card didn't seem to want to communicate with that. So, I left the old NetblasterII router in place to operate the ipronto and routed the computers through the new 802.11a/b/g router. Now, all works very well wirelessly albeit on a Rube Goldburg arrangement. I'm convinced all my problems were Philips'.