Hello everyone...I have a dishnetwork receiver 301. I have it on a dishpro 500 dual lnb. The problem is when I turn it on it runs the transponder test, but it keeps running around and around and will not lock on. I go to the signal screen and it has no signal, and when I run the switch test it shows up al X's. I know the lnb is good as another receiver works fine with a signal strangth of 110. Please help...I do not know what else to look for. Thanks in advance..