I haven't seen this problem, so I thought I would ask. My series3 HD is hardwired to the same Router as my Computer. The Tivo will only see the Computer on occasion, I can't see any rhyme or reason for when it sees it and when it doesn't. My Laptop is wireless and the Tivo sees it all the time. I have rebooted everything one at a time and it seems if I reboot the main router where the cable comes into the house it will see the Tivo at least for a while. It will then disappear and come back on its own. Any thoughts?