I suddenly developed an elevator control problem in FSX. What is happening is I need to put excessive back stick to takeoff or maintain level flight. Actually, what happens is I porpoise and cannot control the airplane.If I allow the elevator to go to neutral the plane nose dives. I use both CH Control Manger and UPFIC to calibrate my controls. According to both programs the elevator is calibrated correctly. If I use outside view, I can see the elevator move. If I allow the stick to go to neutral, I can see the elevator go to neutral. Then the airplane dives.I tried using an older backup cfg file. No joy! I tried removing the CH map and cms files, no joy. Trim is normal. If I fly with almost full elevator it will stay in the air. Anyone have any idea what is happening.

You don't mention what control device you are using (other thatnI assume it is CH). If it is a yoke, is the trim wheel centered? I'm not sure what would happen if it was not centered but it was my first thought. R-

I figured it out. It was the CH Manager program. I have never had much luck getting it to work right. I deleted it and got everything to work in FSUIPC. I have the CH Fighterstick, Pro Throttle and Rudder pedals.