[BoostedK20]

I've been messing with this for almost 3 hours now. I have vBadvanced CMPS and I'm just not getting this to work at all. Just got this error: Fatal error: Class 'vBulletinHook' not found in /home/content/21/7557321/html/forums/includes/class_bbcode.php on line 3289

And I don't know where to put this: ob_start();
echo '<div>';
echo '<center>';
require_once './clientscript/slider/slider.php';
echo '</center>';
echo '</div>';
$output=ob_get_contents();
ob_end_clean();