[Mimedefang] Debian squeeze postfix mimedefang

[cmorg]

Hello everybody

I just install a fresh debian squeeze and install postfix and mimedefang 
with apt-get install postfix mimedefang.
The problem is now the following:

Jun 14 15:26:51 mx02 mimedefang-multiplexor[4260]: Initialized embedded 
Perl interpreter
Jun 14 15:26:51 mx02 mimedefang-multiplexor[4260]: Starting slave 0 (pid 
4277) (1 running): Bringing slaves up to minSlaves (2)
Jun 14 15:26:51 mx02 mimedefang[4276]: Multiplexor alive - entering main 
loop
Jun 14 15:26:54 mx02 mimedefang-multiplexor[4260]: Starting slave 1 (pid 
4283) (2 running): Bringing slaves up to minSlaves (2)
Jun 14 15:27:53 mx02 postfix/master[4397]: daemon started -- version 
2.7.1, configuration /etc/postfix
Jun 14 15:28:07 mx02 postfix/smtpd[4449]: warning: dict_nis_init: NIS 
domain name not set - NIS lookups disabled
Jun 14 15:28:07 mx02 postfix/smtpd[4449]: connect from 
testnode[192.168.1.123]
Jun 14 15:28:07 mx02 postfix/smtpd[4449]: warning: connect to Milter 
service unix:/var/spool/MIMEDefang/mimedefang.sock: No such file or 
directory

The sock file exists and is owned by postfix.
mx02:/etc/postfix# ls -l /var/spool/MIMEDefang/
total 8
-rw-r----- 1 postfix postfix 5 Jun 14 15:26 mimedefang-multiplexor.pid
srw------- 1 postfix postfix 0 Jun 14 15:26 mimedefang-multiplexor.sock
-rw-r----- 1 postfix postfix 5 Jun 14 15:26 mimedefang.pid
srwxr-x--- 1 postfix postfix 0 Jun 14 15:26 mimedefang.sock

So any idea to solve this problem?

Thanks for your help

Marco