"warning: premature end-of-input on private/virtual socket ..." and more

Hi List,

i have the following errorlines in my postfixlog. What could this be?
Can anyone help me? I'm desperated and don't have a clue any further.


------------------------[log]------------------------
postfix/qmgr[11633]: warning: premature end-of-input on private/virtual socket while reading input attribute
name
postfix/qmgr[11633]: warning: private/virtual socket: malformed response
postfix/master[11629]: warning: process /usr/lib/postfix/virtual pid 11636 exit status 1
postfix/master[11629]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
postfix/qmgr[11633]: warning: transport virtual failure -- see a previous warning/fatal/panic logfile record
for the problem description
------------------------[log]------------------------

------------------[main.cf]------------------
myhostname = mydomain.tld
mydomain = mydomain.tld
mydomainname = mydomain.tld
mydestination = server,
localhost
mynetworks = 127.0.0.0/8,
0.0.0.0/0,
localhost
mail_owner = postfix
smtpd_banner = Windows 2003 Server Deluxe
program_directory = /usr/lib/postfix
command_directory = /usr/sbin
deamon_directory = /usr/lib/postfix
alias_maps = hash:/etc/aliases
#MYSQL-Lines
virtual_maps = mysql:/etc/postfix/forward.mysql
virtual_mailbox_base = /var/spool/maildirs
virtual_mailbox_maps = mysql:/etc/postfix/mailbox.mysql
virtual_uid_maps = mysql:/etc/postfix/ids.mysql
virtual_gid_maps = mysql:/etc/postfix/ids.mysql
virtual_mailbox_domains = mydomain.tld
------------------[main.cf]------------------


Thanks a lot
Chris