I completed a quick search of the premier thread and really did not find an answer to my question, so here goes. I have had an HD TiVo for a few years and am using Cablevision with an M card. Everything worked great, I had the wire coming into the room split once for the cable modem and the TiVo and am split for a tuning adapter. Last weekend I purchased a premier and attempted to hook everything up exactly the same way. Took the cable card out of the HD and popped it into the premier. I called Cablevision to authorize the card for the new TiVo. They could not authorize the card or even see that their was one their. I had a service tech in and he checked the line with his meters inside and out and off the pole. He said I have the strongest signal possible. If I run the cable wire directly into the premier everything works great and I have a great picture with the card being able to authenticate. As soon as he split the wire once to add the cable modem and new tuning adapter, the picture got horribly pixelated and made the paid channels unwatchable (HBO, HGTV). Disconnecting everything and wiring directly into the premier with the tuning adapter works great again. The tech rewired everything from the pole thinking the wire or connection was bad. Still no luck as long as it is split the picture is horrible. Once I have it directly wired to the TiVo and the tuning adapter as is well. I gave the HD TiVo to my son. We wired the cable modem split into his TiVo and added a new cable card and tuning adapter and the HD TiVo runs as perfect as before.