I'm trying to add a 211 to my existing 622 dual tuner HD setup. Antennas are a Dish 500 with DPP and 2nd dish for satellite 129 connected to the DPP. I have separate cables to 622 and 211. After the 211 is setup to see all 3 satellites the 622 no longer connects to 129. Can anyone offer some suggestions to make these two receivers work simultaneously?