I am an Expressvu subscriber and I'm trying to make my Expressvu receiver work in my motor home which has an older KVH TracVision SF satellite dish installed. I talked to TracVision and they said my receiver should work but I can only lock on Nimiq 91. There doesn't seem to be much programing on 91, all I get is movie promo's. I can get a signal off 81 but it's not good enough to lock the receiver. Is most of the programing on 81. Should I try replacing the LNB?. Also I'm in the Phoenix area at the moment so not sure if I'm in the satellite footprint. Does anybody know if I will need two LNBs to make the service work?