I'm having an issue with getting off-air channels in my DirecTV guide. I have a DirecTV DVR (HR20 i think). A friend from work is trying to sell me his off-air antenna that didn't do him much good (too far away). I connected up the antenna to my dvr and was able to go thru the antenna setup successfully. The screen showed me that it was downloading guide info and found quite a few off-air channels. I can even see the strength of the channels (most are around 70%), but when I go back to my DirecTV guide, no new channels to choose from. I spent about 45 mins on phone with DirecTV 1st level support then on to a supervisor. They are going to send out a tech on Wednesday. Has anybody else run into this issue? Any suggestions?