Integrated brake controller problem

I have a 2008 f-250 with the factory ibc, which works great. The problem is I noticed the other day while hooked to a trailer, that in the info center in the dash is showed 0 tbc gain and no output. but the brake controller under the radio showed 5 gain and the bar graph would increase like nornal. i talked to my dealer and know nothing about what going on, and don't really want to help. i was just wondering if any one else had this problem.