I have Cablevision on Long Island and recently moved. I was told by the installer that at my new address, tuning adapters were no longer required to receive the HD HBO channels. On my Tivo HD he installed a single M card and I got everything, no problem. On my Tivo Series 3, he installed two S cards, and there I get HBO HD but do not get several of the secondary HBO HD channels (801, 802, 805, 806). Instead, I get a message, "channel not available." This has been a problem from day 1. I spoke with a representative today who told me that I may need a tuning adapter for the Series 3 even though I don't need one for the Tivo HD. I'm willing to try, but this did not make intuitive sense to me. Am I missing something? Thanks!