I have a Zimwell MS6X8WB-2 switch the DTV installer gave me when I had the HD receiver installed. I told him I will get another receiver some day so he gave me this switcyh, but he gave me no directions on how to hook-up the Zimwell. He just "capped" the two flexports and outputs 6,7 & 8 and told me not to use those. Well now I have my second HD DVR receiver so I tried to connect it. I connected the two cables from the dish into the switch and the outputs to the receiver. Now some channels don't come in, I get the "searching for satellite xx", or some come in but are in SD, and some do come in HD. I tried every combination of the 2 satellite wires into the Zinwell inputs (13V & 18V, no 22kHz and 22kHz) with the same result. Reading on the internet I keep reading about 4 wires coming in from the dish, but I have two. Please tell me what I am doing wrong, and perhaps give me an explanation on what is actually happening to allow HD reception. Back a few years ago when you pointed to one antenna and there were no HD or local channels, I understood how the system worked. But I am bit behind now. Thanks...