Trim

Hello,
How come my aircrafts wont trim with my autopilot.
I turn the trim just a little bit but then it goes back and when I'm flying with or into the wind my aircraft is like 10 degrees nose off?
What could I do?
How come my aircrafts wont trim with my autopilot.
I turn the trim just a little bit but then it goes back and when I'm flying with or into the wind my aircraft is like 10 degrees nose off?
What could I do?