500 error after installing su_php, permissions issues, "UID of script "/index.php" is smaller than min_uid"

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http://serverfault.com – I have just installed su_php on my server (amazon ec2 instance), It is required for 1 of my applications. Now, I am getting a 500 Internal server error when visiting all of my hosted sites. The error logs: [error] [client ip] SoftException in Application.cpp:350: UID of script "/var/www/html/www.mywebsite.org.uk/index.php" is smaller than min_uid [error] [client ip] Premature end of script headers: index.php ls -l of the webroot show: drwxrwxr-x 2 root root 4096 Aug 7 14:23 aws.anothersite.co.uk drwxrwxr-x 7 ec2-user root 4096 Oct 5 18:36 content.mywebsite.org.uk drwxrwxr-x 5 (HowTos)