TiVo series 1 Randomly PAUSES


After installing InstantCake (SW-ICAKE-S1SA-DL-002) 2 Weeks ago to replace my failing Seagate 120GB with a Seagate 320GB on my TiVo series 1 Phillips HR312, then 1 week ago when it is in PLAY Mode, it Randomly goes into PAUSE Mode once or twice an hour or two. Anybody have any ideas how to Fix???
Thanks
DynamiteGuy