I upgraded to a Slimline dish last night. After lots of frustration I was finally able to get a good signal on most of the transponders on satellite 101 (either 96 or 100) except for the entire 4th column which was all zeros (#s 4, 12, 20, and 28). Anyways, I later noticed that none of the standard definition channels had any audio. All of the HD channels are great. How do I need to go about fixing this? Is this just something that needs to be adjusted at the dish? Thanks for your help.