Need some help please. Here in Des Moines we have 5-2, but my AM-21 won't find it. I can hook rabbit ears up to my TV and my TV see's it, but my AM-21 with an OTA in the attic with excellent signal, I can't get the AM-21 to see it in the channel line up. I have done a reset on the AM-21 and did an initial set up, but still no joy finding it. Any help would be great.