Thanks for the support. DP311 receiver is 5 years old and is installed in my motor coach. Only receiver in the unit. Works off a KVH roof sat just fine and has also been working on an older Dish 500 twin LNB (on a tripod) with two seperate leads through an SW21 switch. I picked up this DPP Dish that was used in an home installation and worked there. Just wanted to upgrade to a newer dish and eliminate the external SW21 switch. I understand the issues of cables, connectots, etc. Could it be software?