This sounds like the pushrods for the control surfaces are on the wrong side of the servo horns. Set up the Tx so the elevator function is reversed, so pulling back on the stick gives down elevator. Then remove the servo horns and turning them 180 degrees so the pushrods are on the oppisite side of the servos. Then check aileron function. Hope this helps!


edit: Switching only one servo horn may work also, then reverse the other channel. It's tough to picture the problem without seeing it.