sry, its gone already.
what i did now is, create snapshot from vm
then:
uninstall sepm, reboot, reinstall sepm using the restore file. shutdown the sepm, sepm website and database services. copy the old database and database log intot the db folder, then restart all services.
i have all folders and groups back, also all polices i imported from my old symantec server. additionally i can see my clients again and they get updates.
only thing i have to fix now, the clients show the server offline. when i right click the symantec client and go for "update policy", they show me the green connection ball for a second and under "troubleshooting" i can see the server onöine for a second, then they are offline again. this was the client looks like an unmanaged one, but is fully funcrional.
i will try the sylink now, maybe that will change it back...