It sounds like your cable card was not properly paired. What does the cable card screen say? for VAL? Auth?
Did you run Guided setup again after the card was installed/paired?
Series 2 (PLS, sold)
TiVo HD 1TB (157 HD Hrs, PLS, "652")
Roamio! Oh, wait, Its Juliet!
OTA! OTA! OTA!
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!