I am trying to install a Terk 3x4 multi switch to a Dish 500 twin lnb (two room) post 2000. Do I only need to run one of the cables into the multi switch. With both cables I am only getting Sat 119 West. 110 is not present and I am missing channels. The dish directions say that both cables carry both sat signals from the twin lnb. Will a multi switch even work with the Dish 500 twin lnb or do I need a special multi switch? Can someone please explain the proper connections. Thanks for any help.