I am having a problem with my autopilot on just about every aircraft.When ever the plane reaches the altitude set the nose pitchs up 30-45 degrees and stalls out. And it's not just the big boys either. I was flying the new meljet777 and when the plane reached 36100' the nose just pitched up and it stalled and started to lose altitude rapidly. When I leveled it out, it did it again. I've tried turning off the A/P and turning it back on but to no avail. Any ideas?

Are you by chance using the autothrottle to control the speed? Next question--have you configured FS2002's instruments to read IAS, or TAS? If you use TAS, it introduces a common error--FS pilots will set the airspeed for 280kts... But in the flight levels, 280kts TAS is very close to the stall speed of a clean heavy jet.... The A/P will struggle trying to maintain altitude at this speed. The fix is to select "IAS" for your setup, or select a higher autothrottle speed equivalent to the true airspeed desired...If this isn't true in your case, then you may be seeing another issue--that of the aircraft being set for too high a climb rate given the loading and alt you are trying to reach. Many heavy a/c with large loads have to step climb to cruise altitude.-John