I have the Motorolla DCX3400M HDPVR . I cannot get it to record as a series new episodes of Big Bang Theory on any HD channel. This has happened with other shows too but this is the latest one I have tried. this is very frustrating ( to put it mildly ). why is this ? It also will not let me record only new Rick Mercer Reports on CBC ,it will always record every episode they show including repeats . again why is this ?