register callbacks error

Hello all,

I have greylisting successfully been running on Solaris9
and I wanted to move the installation to a Solaris10 machine now.

I've got threaded perl 5.8.8, sendmail-libmilter, mysql5-database,
and Sendmail::Milter installed. The connection to the database
is working:

"Loading Config File: /etc/mail/relaydelay.conf
Using connection 'local:/var/run/relaydelay.sock' for filter relaydelay
DBI Connecting to DBI:mysql:database=relaydelay:host=notlocalhost:port=3306"

and then I get the error:

"Failed to register callbacks for relaydelay.
Closing DB connection."

It seems to be a Mysql-DB problem? 
Maybe I missed something during installation?
I also tried another Mysql-server (lower version) with no success.

Does anybody know about this issue?
Any help ist highly appreciated -
Thanks in advance!

Christine Kuhlmey