For the last couple of days, my Tivo HD no longer appears on my Premiere XL. The Premiere shows up on my Tivo HD. Here's the weird thing: I restarted my Premiere, and the HD shows up. I set up some programs to transfer from the HD to the Premiere. While the transfer is in progress, I look at "My Shows", and the HD no longer appears, but the transfer continues and completes successfully. I have done this three times now. I have wired ethernet and recently replaced the XL drive with a 2Tb Samsung, but have changed nothing else. Anyone else with a similar problem, or a possible diagnosis/fix?