Minimum System Requirements
These are the Minimum System Requirements. vBulletin 5 Connect will not run or install if these conditions are not met.
PHP 5.3.0
MySQL 5.1.5
mod_rewrite, URL Rewrite* or equivalent.
You must upload the included .htaccess or web.config files.
GD or ImageMagick need to be installed and functional within PHP
cURL or OpenSSL must be installed.

Recommended System Requirements
These are the Recommended System Requirements.
PHP 5.4+
MySQL 5.5+
http://www.vbulletin.com/forum/forum...m-requirements