Problem with One of my OTA Channels

[lagman]

I just hooked up a brand new OTA antenna (Channel Master 2016) in hopes I will finally be able to pull in all of my locals OTA. I hooked it up directly to the TV and all of the channels came in at around 60-70%. I then connected the OTA antenna to my HR20-100, and everything comes in at 60-70% except one channel (Fox 28, digital channel 27), which was at 0%.

I thought maybe the problem was that D* had the channel mapped wrong, so I changed my local area to another area with a digital channel 27 (Fox 5 in Atlanta), and that channel also comes in at 0%.

Any idea why my HR20-100 has a problem with digital channel 27?

Thanks,
Dan