WIN CE How to stop auto-shutdown Holux GPSmile 61CS nav?

Hello folks,

Whenever the external power shuts off, the navigator will produces a screen with 3 options: Exit - .. - Resume
This is very annoying, because when starting the motorbike all power is killed, except to start the engine. And the nav shuts down if I not quickly press 'Resume'.

I tried below options in the sys.txt:

But no effect whatsoever.

Is there a way to kill the shutdown process in WinCE?

Thanks, Marten