Living in South FLorida. Since I first lost some of my BEV transponders, I added 2 new 37 inch dishes for 91 and 82. I got all transponders with signal strength to spare. One month later I lost some of the transponders again. I changed my LNBs, my SW21 switch and tried new cable. No help. Please give me any ideas. My receiver is a BEV 6100.