Fixed, Thanks!

Sorry for posting this here (didn't look in the other category).

Turn off your plugins.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php

define('DISABLE_HOOKS', true);

Then please read this thread - Installation Issues / Questions or bug reports regarding default vBulletin 4.0 (http://www.vbulletin.org/forum/showthread.php?t=228035)