I recently added a third receiver to my direct tv satellite. I am using a 2x4 multiswitch and after connecting the third receiver things have gone bad. You can watch local channels on all of the tvs at the same time but when one changes to a cable channel then you can get the voice of the local channel but the picture of another channel on the other tv. One tv gets all 4 transponders while the other two are not getting the 101 odd but are receiving the others. I have switched receivers and cables. It is a new multiswitch so I am really confused as to the problem. Someone Please help.