I have installed additional php versions on ubuntu server 12.04 following the how to forge guide. The PHP FPM is running fine on the server. In ispconfig control panel I am able to select and assign the opt/php fpm to a website. The /etc/pool.d/ folder is correctly getting populated with conf file. The problem is when I am check in my joomla installation the default php version showing and there is no effect of the change. But if I apply the opt php for fast-cgi the changed are reflected in joomla installation without any problem.