Hello I created a subdomain "sd.domain.com" using Add New Website button. However while HTML files are being shown, for PHP files a message "500 Internal Server Error" is being shown. I am using the latest stable version of ISPConfig 3 on a Ubuntu 12.04 VPS. In the apache logs only multiple messages conveying same info- that "favicon.ico" is missing are there-- now I have uploaded that as well-- however there is no other message in apache logs. Any help would be appreciated. Thanks, Arvind.