I bought the IR Adapter for my Series 3. I want to put the tivo in an equipment closet. The Tivo website said that it would work on any unit that has a USB port. Tivo technical service also said that it should work since I have a USB port. The adapter doesn't work, though. A red light in the adapter flashes everytime I push a button on my remote, but the tivo doesn't respond. The instructions also say that the adapter is for a Series 4 (I didn't have that info until I got the actual unit). So, I'm guessing that the Series 3 software simply doesn't support the IR adapter. Has anyone had success with it?