Hey, I just installed a BEV 4100 receiver and a 51cm dish at my house in California. I have great reception (80%+)on most of my transponders, but I get no reception on the following odd transponders: 3, 7, 9, 11, 17, 21, 23, 25. I've checked my wiring and there are no shorts in the system. Do I need to switch to a larger dish? Or is there some other problem I'm overlooking (location, spot beams, etc)?