King Air keeps forgetting radio setting

[reiler]

Hi

I use the King Air in my real King Air simulator. Because I have (nearly) all controls mapped via Mobiflight, I am flying with hidden cockpit.
I use PMS50 GTN750 as a popout, and this gives me a problem.

The popout is always there, but sometimes the BSQ King Air "forgets" my setting (the switches near the co-pilot) and reverts to old radios.

My GTN750 looks normal in the popout with flightplan and all, but the autoppilot does not work with it, and it is very annoying, because I don't know that the 750 is not active in the plane until I am flying.

Is there a way to make sure that my plane always is using the 750, I think about a conf-file or similar?

[altack]

Hi Guys,
I get the same problem (from time to time) using MSFS popout Manager and my.... G1000 King Air homecockpit (but with the great Black Square Analog King Air as a backbone).
So any help on that matter would be appreciated.
Regards,
Francois