Подключение фреймворка - ZOO

    $.post('templates/blah/ajax.php', {'data[]': something}, function(data) {
        alert(data);
    })

Fatal error: class "systemHelper" not found in /site/administrator/components/com_zoo/framework/classes/app.php on line 162

<?php
    define( '_JEXEC', 1 );
    define( 'DS', DIRECTORY_SEPARATOR );
    define ('JPATH_BASE', dirname (__FILE__). "/../..//");
    require_once ( JPATH_BASE .DS.'includes'.DS.'defines.php' );
    require_once ( JPATH_BASE .DS.'includes'.DS.'framework.php' );
    require_once ( JPATH_BASE .DS.'libraries'.DS.'joomla'.DS.'factory.php' );
    require_once ( JPATH_LIBRARIES.DS.'import.php');
    $app = JFactory::getApplication('site')->initialise();
    require_once(JPATH_ADMINISTRATOR . '/components/com_zoo/config.php');
    $data = $_POST[data];
    echo $data[0];
?>

$session  =& JFactory::getSession();
$data      = $session->get( 'data' );

 $.post('/index.php?ajax=1', {'data[]': something}, function(data) {
        alert(data);
    })

if (JFactory::getApplication()->input->getInt( 'ajax')){
die('<h1>Получено</h1>');
}

function onAfterDispatch() {
		
		if($this->app->system->application->isSite() 
			&& $this->app->request->getCmd('option') == 'com_zoo'
			&& $this->app->request->getInt('ajax') == 1) {

			echo "!";

			jexit();
						
		}	
	}

jQuery('#div').load(window.location.href+' #div');