Shared/reseller servers are compiled with php 5.2.x and 5.3.x so that anybody who needs a upgraded version of php doesn’t have to upgrade to a VPS OR dedicated server. php 5.2.x is enabled by default on our shared/reseller servers. To enable php 5.3.x create a .htaccess file under public_html and add the code below.
AddType application/x-httpd-php53 .php
This will enable php 5.3.x for your account.
If you still face the same issue, contact our support team & they will have it enabled for you.