I
believe which I have the problem solved:
I use a scenery manager that modify my scenery.cfg if I something install. I install the LSZH Scenery without setting Priority up or down and the LSZH-Scenery works.
When i switch the Priority with my Scenery Manager to my other Swiss Addons, the LSZH is in "Scenery Protection".
I download a other Scenery.cfg Manager and it works now Great !
this Scenery Manager makes trouble perhaps also by other Users with same Problems:
AVSIM.COM
Filename: fs_scenery_manager_v1.4.zip
thank you for help!