I have a dish 500 with a 508 receiver in my basement and a 510 receiver in the family room. I never have problems with the 508 but continually have problems with the 510. In particular I only get about a 2 day EPG, my PPV channels never work, and I get a message acquiring sattelite signal a couple times a week. When I run a check swith in the basement it comes back fine while in the family room it comes back 119 Odd, 199 even, 110 Odd, 110 X. Do you think this is a connection problem or a SW21 problem?