HR20 and OTA problem with one channel

[goober22]

I have an HR20-700 setup with an OTA antenna. I have a problem with the FOX channel. I have strong signal but the HR20 won't pull it in. I can pull it in okay with my tvs built-in tuner. Here is my readings and info:

CBS-4 = Digital 36 UHF = 55-57 tv tuner = 77 HR20 tuner
NBC-7 = Digital 8 VHF = 72-73 tv tuner = 77 HR20 tuner
ABC-13 = Digital 19 UHF = 66-69 tv tuner = 77 HR20 tuner
FOX-28 = Digital 9 VHF = 49-55 tv tuner = 69-76 HR20 tuner
PBS-11 = Digital 56 UHF = 28-35 tv tuner = 43-50 HR20 tuner

All channels and subs pull in fine except FOX on the HR20.
Fox28 is WPGX. My tv tuner pulls it in fine as long as the signal is 30+ but when I try to tune it on the HR20, I get "Searching for signal on the off air tuner... (771)". The HR20 constantly shows the signal level in the low 70s but never pulls anything in.

I have tried re-aiming the antenna and those are the best signals I can get and get all the channels. FOX is a VHF channel but so is the NBC one and it pulls in okay. Towers distances are 17-21 miles for ABC, NBC & FOX. CBS is 57 miles, PBS is 24.

One other note, my tv identifies it as 28- or 28-0 (instead of 28-1). The HR20 shows it as 28-1. Not sure if that matters.

Any ideas why the HR20 won't pull it in even though it says it has a good signal - and my tv will pull it.

Confused.

[goober22]

Just a followup in case others have a similar issue.

Above I said:

One other note, my tv identifies it as 28- or 28-0 (instead of 28-1). The HR20 shows it as 28-1. Not sure if that matters.

Well, it does. I contacted the station and found they had incorrect PSIP data as far as the Major/Minor channel assignments go in the data stream. They corrected it so that it now shows as 28-1 instead of 28-0. The HR20s pull it in now as does another digital set I had that would not.