if I try to restart the cron I get the following message .. maybe also depends on what? root@ks3097509:~# /etc/init.d/cron restart /etc/environment has been deprecated for locale information; use /etc/default/locale for LANG=it_IT instead ... (warning). Restarting periodic command scheduler: cron.
I posted the debug instructions in the beginning of the thread: http://www.howtoforge.com/forums/showthread.php?t=58408 And its still not clear to me if you ever manipulated or deleted any data directly in the sys_datalog table or no since you installed ispconfig as this will lead to this problem.