I just tried to set up a new HR22-100 receiver with an exisitng slimline 5 lnb SWM system but durign set up I coul donly select the 3 lnb SWM system. This lead to errors in set up. I've tried to unplug and reset several times with same result. The dish is greyed out and I can't change the dish type. Directv says to switch out the receiver. Please help is this really neccesary?