10.8 server activation devicemanager not possible

Dear all,

after reseting the Profilemanager according "http://support.apple.com/kb/HT5349?viewlocale=de_DE" I am not able to re-activate the devicemanagement.

I tried to re-configure the "diradmin" but it allways said "diradmin allready for devicemanagement configured".

So I only need to know how to start the devicemanagement.

Anyone an idea?

Best Regards

Stefan