Advertisements stuck on one channel. Can access tivo central and tv listings, etc., just that when I request a channel change, the TV remains set on same channel. Tivo series2DT connected with Comcast cable box (Motorola) with new LCD TV. Tivo is showing recording programs, but the recordings are being done from the same original channel, nevber changing to proper channel. So TV is not recognizing the request to change a channel I assume? Please help....have been at this for over 12 hours with NO help from Tivo or Comcast. Never had this problem before, but just hooked up new LCD TV. BTW - using serial cable connection, not IR cable.