Permission denied with creating mailboxes

[Manfred Rebentisch]

Hello,
I use debian etch with cyrus 2.2 and sasl2.

cyradm --user cyrus --server localhost
IMAP Password:
              localhost>
localhost>
localhost> cm users.testusr
createmailbox: Permission denied


I cannot find out, why this happens. There are no log messages, no information 
about the reasons. It should be nice to get reasons from the program...

I do check the ownership of files (/etc/sasldb2, /var/lib/cyrus/*, /imap/*) 
and so on.

I think, the user "cyrus" has not the right to create mailboxes. But I don't 
know, how to set this right.

Thank you for tips.
Manfred