i have a dm800hd and i am having trouble setting up my eagle aspen c-band lnb with it. the lnb is hooked up directly to the receiver. my settings are lof/l 5150 lof/h 5750 and threshold 00000. i am only able to receive vertical transponder. i can switch the lof/l with the lof/h and i get the horizontal but no vertical. am i missing something?