I bought the Saab 340A for X-Plane 10 a while back. However, I am having severe difficulties trying to get the aircraft to climb. I followed every procedure in the Auto Start manual, but when I takeoff, the aircraft refuses to climb above 500 feet, even at max power with the flaps partially retracted. If I retract them all the way, the plane loses altitude, then stalls if I try to pull up. Please help!