Forum Fatal error when installing new products.

[محروم.كوم]

Hello, new to Vbulletin and I've been getting this problem. I've also gotten this problem while trying to install several other plug-ins. Before this I tried to import an xml for a new template and also got a similar Fatal Error. I get a feeling that something didn't install correctly or is missing, but I've yet to figure out what. If anyone can help at least figure out this code below it would be a start.

Fatal error: Call to undefined method vBulletinHook::init() in /home/pkcards/public_html/forum/adminzp/plugin.php on line 2450 __DEFINE_LIKE_SHARE__