Just got my 622 so I moved the 942 to the bedroom. Hooked it up with no problems to my bedroom tv. Then I tried to backfeed the TV2 output to my son's tv and I lost almost all of the channels, the receiver only could see some transponders on 110 (I have a Dish 1000). I have a DPP 44 if that helps. When I take the diplexers and the TV2 connection out of the setup, it works fine again. Any ideas?