Please forgive me if this has been asked, I'm new here and didn't see it anywhere. When I had DTV install my Slimline5 they ran 3 coaxial cables from the dish to the house. They connected 2 of these to my HD-DVR receiver and 1 to my regular HD receiver. DVR is in the living room and regular HD receiver in the bedroom. All worked well. I just bought a 3rd receiver. It is a regular HD receiver. I bought a Zinwell 6x8Multi-switch so I could hook this 3rd receiver up to the dish. Now, I do not get all of my channels. Do I need to run a 4th coaxial cable from the Dish to the Multi-Switch to get the rest of my channels? Thanks for any help you can offer.