Since Monday, two of my 4 Tivos keep losing Network connectivty to see each other. The two that are hardwired never lose connectivity, the two that are running ethernet wireless adapters are the ones in question. When are redo the network connectivity, all is fine for about 5 minutes. All Tivos can see each other in the MY SHOWS listing. Then, after 5 minutes, the two that are ethernet wireless drop out. I redo the network config, and they are there again. I have bounced the router, the Tivo's, etc... No change. MRS and MRV work fine when you connect... Any ideas as to what is causing this and what is the culprit? I have a Netgear WNDR4500 router.