When I got my Genie it worked fine with this set-up. Two genies and two HD DVR's. After about a month I started getting errors - 771 Signal loss on satellite 1. I called DTV and they charged me $50 for somebody to come and try to fix it. He got it working and it worked for about a month and now I'm getting the same error again. I've checked all the cabled and rebooted the SWM's of course. I even checked the cables outside and checked the dishes. Any thing else I can do/check before I call DTV?