i need some help ... when i switch from 1 sat to another .. my other reciver comes up no signal... i have 3 dishes on my roof 1 to bev 8.6 and 7 i have dual lnbs... i am useing both duals and it doesnt mater what what sat i turn to it puts other reciver to scrambled channel or no signal... i have changed switches with no luck any help will do thanks