ok, windows xp defaults to read only and causes problems with some sticks. There are files you can delete, but the easiest way is to uninstall AH, then look on your c: drive and make sure the whole folder is deleted.
Then re install, and make sure your stick and settings files are deleted.
Calibrate your joystick in windows, if you can.
When you log onto AH, DO NOT CALIBRATE YOUR JOYSTICK.
Leave it as is, and don't change your sliders, either.
The calibration in windows should be more than enough.
The same thing happened to me, and I've been flying 3 weeks now since I did that fix, with no trouble.