Finally got it working. Restarted PC and thus X plane as well. Had to assign a button to "lift Levers" else "throttle 4" was unassigned when choosing the "detend"-option in the prefs. Thanks for your quick response in this matter, much appreciated :-) I'm happy again.
Trying to do some VOR navigation. The nav1 is tuning in to the right frequencies but I hear no morse-code to identify the VOR.