Forum facebook option error
 

when i Enable Facebook Platform im getting this error in the entire forum .

Warning: Missing argument 2 for Facebook::__construct(), called in [path]/includes/class_facebook.php on line 194 and defined in [path]/includes/facebook/facebook.php on line 64

Warning: Illegal offset type in isset or empty in [path]/includes/facebook/facebook.php on line 418

Fatal error: Call to undefined method Facebook_vUrl::getSession() in /home/otach/public_html/supremacysounds.com/includes/class_facebook.php on line 197

any thoughts ?