Everything seemed to be in order as I located and locked in on my True South Satellite @ 123W (scanned and watched some channels) using USALS and then I motored the dish over to 72W with decent signal quality and then scanned (got the GBN channel crystal clear). So I should be tracking, right? Well, when I motored the dish to 74W and went to the transponder that has ONN, I got absolutely zero signal quality. Then I tried a different satellite (AMC 4 @ 101W) and I got good signal quality there, scanned and picked up all the channels without a problem. Can't seem to get a couple other satellites, such as 89W and 103W, either. By the way, my Latitude = 37.75 and Longitude = 121.95, STAB HH90 Motor set @ at approximately 37.5, and Dish elevation set @ approximately 39on a Fortec Star 90cm. What do I need to do to correct the problem?