The mailing list for listmasters using Sympa

[address@concealed]

Hello,

I have a problem with sympa (3.3.3-2) running virtual hosts on a debian 
(woody) machine with qmail/ldap.
The apache config is working fine.

My setup:

sympa.conf:

home            /var/spool/sympa/expl
etc             /etc/sympa
pidfile         /var/spool/sympa/sympa.pid
umask           027
syslog          `/bin/cat /etc/sympa/facility`
log_socket_type unix
nrcpt           40
avg             10
maxsmtp         50
sendmail        /usr/sbin/sendmail
host            mail.DOMAIN1.com
listmaster      address@concealed
wwsympa_url    `echo -n 'http://'; hostname -f | tr -d "\n"; echo -n '/wws'`
cookie          `/bin/cat /etc/sympa/cookie`
email           sympa
...etc

robot.conf: (in /etc/sympa/domain2.com/)

host            mail.DOMAIN2.com
http_host       www.DOMAIN2.com
listmaster      address@concealed
wwsympa_url     http://www.DOMAIN2.nl/wws
email           robot


If I create a list on DOMAIN2 everything seems okay, i can subscribe and I 
even get a welcome message from the robot.
But when i post to address@concealed i get a message from address@concealed:

"This is an automatic response sent by Sympa Mailing Lists Manager.

The following address is not a known mailing list :

address@concealed"

Also when i try to send a command (like "HELP") to address@concealed i get a 
message from address@concealed:

"This is an automatic response sent by Sympa Mailing Lists Manager.

The following address is not a known mailing list :

robot"

Any idea anyone ?

greetings,

Kees