I fulltime in an RV and used Slimeline dish with a 5LNB non-SWiM "head" with 4 individual leads (I only used 2) and everything worked fine. Today, I switched over to a 3 LNB SWiM "head" with power inserter and DC pass thru splitter. I changed both of my H21 receivers to the 3 LNB SWM setting and so far, everything is working OK except the guide is not updating with current programming. I'm getting a 920 error. Any input on this?