Airbus A320 autopilot switches off automatically after reaching the specified values ​​(X Plane, Simulator)?

Hello dear community! Quick question about X-Plane 11: I got the A320 from JarDesign, want to fly with autopilot, now the following problem: As soon as the autopilot reaches my input, it automatically disengages. However, the aircraft then no longer maintains the same altitude/speed/course. What do I need to configure to ensure the autopilot always…