pure-ftpd-mysql lässt sich nicht installieren

root@vps-XXXXXXXXX:/etc/init.d# apt-get -f install pure-ftpd-mysql
Reading package lists... Done
Building dependency tree
Reading state information... Done
pure-ftpd-mysql is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Setting up pure-ftpd-mysql (1.0.21-11.1ubuntu2) ...
Starting ftp server: Running: /usr/sbin/pure-ftpd-mysql -l mysql:/etc/pure-ftpd/db/mysql.conf -l pam -H -E -O clf:/var/log/pure-ftpd/transfer.log -u 1000 -b -A -B
invoke-rc.d: initscript pure-ftpd-mysql, action "start" failed.  
dpkg: error processing pure-ftpd-mysql (--configure):
 subprocess post-installation script returned error exit status 252
Errors were encountered while processing:
 pure-ftpd-mysql
E: Sub-process /usr/bin/dpkg returned an error code (1)