Hi I have a Dish500 dual lbn labeled 110 and 119 on it. The dish network tech guy installed it. I want to change it to pick up BEV Nimiq 91 satellite. I have a BEV receiver. I can't seem to locate it, no problems locating 110 and 119 though. I spind the dish around ( azimuth ). Haven't tried changing elevation or skew. Do I need something special to use my dish for the BEV 91 sat? I live in California, Bay Area.