PROFTPD - dead

[monstermedia]

out of a sudden proftpd stoped to work... (after I add a few domains - but not any ftp account)

when tried manually restart.... this is error:

Code:

/etc/init.d/proftpd restart
Stopping ftp server: proftpd.
Starting ftp server: proftpd - error: /var/log/proftpd is a world writeable directory
- mod_ctrls/0.9.4: unable to open ControlsLog '/var/log/proftpd/controls.log': containing directory is world writable
- Fatal: ControlsLog: unable to log to a world-writable directory on line 168 of '/etc/proftpd/proftpd.conf'
failed!

what has happend?? server was working properly about two weeks....

regards