Unable to Arm

Hey Everyone,

I have a funny Problem with my APM. If it is connected to a USB Port and I am connected to the Ground Station i can ARM the APM with my Radio.
If I Disconnect from the Ground Station it still works. But then if I unplug the USB Cable the APM Rapidly Disarms and I am not able to re arm the APM :-/

I have checked the parameter on that if the connection is lost to the ground station and it is set to disabled…

I hope someone could give me a hint what the problem could be or how i can find out what it is :slight_smile:

Thanks a lot for the help