[Dovecot] warning: connect to transport dovecot: No such file or directory

I have installed postfix, dovecot, mysql as per:

http://wiki.dovecot.org/HowTo/DovecotLDAPostfixAdminMySQL

..on Debian Etch. I thought mailboxes were created by postfixadmin or postfix but I only get an error:

warning: connect to transport dovecot: No such file or directory

..in the postfix log. No /var/vmail/example.com is created. After creating the domain directory and user directory, applying correct ownership, still it made no difference. I checked my main.cf:

virtual_mailbox_base = /var/vmail

Any clues?

Thanks! David Koski david@kosmosisland.com