I met a problem when I tried to use ACLS or Altitude hold.
When I press NWS/Autopilot button, A/P ref light go out for a while and then come back.
Same with ACLS, ACLS ready light go out for a while and then come again.
I tried changing button (default N) to somethig else, nothing has changed.
I disconnected joystick and even keyboard (after pressing NWS/AP button) , it didn't help.
I'll be glad for your help.