I am trying to replace a HR24 with a THR22. The signal strength for 101, 99c, and 103cb are all above 90, but 103ca shows "NA" for all transponders. The HR24 doesn't have this problem. This same behavior is seen with another dish at a different location. Has anyone seen this issue? If I can't get 103ca, then I'll need to return the Tivo unit.