Loss of digital signal...help

With my Pioneer Elite dvd recorder with Tivo plugged into my B&K avr307 using a digital coax cable, I lose sound when I change channels too slowly, or if I fast forward or rewind for too long. I then have to switch the receiver's remote control to a different source, and come back to SAT for it to work again. Any idea why the signal is lost?? This does not happen when I fast forward or rewind a dvd in my Sony 9000es dvd player (also connected with ditial cable)

Any help would be greatly appreciated.