#52 Virtualmin can´t create Unix Group

[usncs24]

Virtualmin version 2.610
Webmin version 1.60
OS = SUSE 10.0

Whenever I try to add an virtual server I get this
error message.

Creating home directory ..
.. done

Creating Unix group testdomain ..
Failed to create Unix group!

---- end ---

But, the group is created.

Thanks for any hint.