I have a h24700 receiver with a slimeline 5lnb dish i get most of my hd channels with b band convertor hooked up but a few say searching for signal. however when i disconnect the bband convertor i get the hd channels i was not getting before but yhe ones i was getting i now get searching for signal. any ideas what problem could be. Also on sat 101 mt ss i8s in the 90+ but when i hook up the bband convertor drops to 70-75