GT2R,
It's just the elevators flipin out? If so, it must be the reverser. Have you tried to move your antena? Best solution is a Futaba 9C!

My UCD has all the mixes, flaperons, spoilerons, flap>ele, ailerons > alievators, snaps..... all easy to do on the 9C, and copy to another plane to boot.
Mac