I cannot access any new HD channels from Cox, and I have lost others. HUBHD, some of the StarsHD, and EPIXHD channels stopped working. Some say channel not authorized and others say channel not available. Cox Techs have tried everything on their end and multiple cards with the same problem. They say it is my Tivo and won't help anymore. I don't want to do a clear and delete all unless I have to. My tivo also hangs when restarting. Has anyone had similar problems or any tips?