Okay i solved the problem!
You have to logout from for apple account in itunes.
I cleared all caches in itunes and cookies in safari, too.
(The "itunes match" session is stored in the safari cookies for some reason, so i deleted them to be sure.)
After closing itunes i logged in again in with my apple id.
then in settings i reactivated the "icloud music library" (the new itunes match) and waited to let itunes match finish its library search.
After that i activated apple music, too.
No if i apply apples fix:
Delete downloads from matched songs which appear as apple music file
and redownload the songs after that they all appear as my own songs without the .m4p drm protection.
So i hope i could help someone who had the same problem.
The important thing is to log out from your apple id in itunes and clear everything like i explained.
When you relogin everything works like it should.
Regards
Julius