Just thought I would write a quick guide on this as it such a recurring question. Firstly, make sure you upload the script into the cgi-bin in ASCII mode. This is a problem more oftern then you can imagine. chmod 755 the script. Check permissions are USERIDsacln (the directory should be USERIDsaserv). Of course check that the site has CGI support ticked. You can also verify the syntax of the script by running "perl -c SCRIPTNAME.CGI" and it should report syntax ok. If you're still having problems then check the logs. Check /home/httpd/vhosts/DOMAIN/statistics/logs/error_log (some installs my use /var/www/ as opposed to the plesk standard /home/httpd/vhosts) and look for errors. This log file will usually show the error message on the screen. You may also need to check /var/log/httpd/error_log. If you still don't see the problem then check /var/log/httpd/suexec.log for any Finally, check the correct suexec version is being used. do an "ls -la /usr/sbin/suexec" and compare that to /usr/local/psa/suexec/psa-suexec. If they are different then make a backup copy of /usr/sbin/suexec to something like /usr/sbin/suexec.orig. then either copy or make a symlink of /usr/local/psa/suexec/psa-suexec into the /usr/sbin directory. Hopefully this has been helpful.