Warning: require(php-sdk/facebook.php): failed to open stream: No such file or directory in /var/www/master/Vibe/index.php on line 7

Fatal error: require(): Failed opening required 'php-sdk/facebook.php' (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/master/Vibe/index.php on line 7