got my boat out for the first time in months and found my trailer brakes were not wanting to fully disengage. They were grabbing slightly while under power and I didnt notice until we got to the ramp (they were pretty hot). Got home and pulled it off the truck and worked the accuator manually. They seemed to release fine. Put it back on the rig and had the same problem

. The trailer is an 07, with nothing in the manual about adjustments. Suggestions?