public function _notFound($action, $params)
    {
        $this->_response->setStatusCode(404);
        $this->errors[] = $this->locale('ACTION_NOT_FOUND');
        $this->errors[] = "Action: $action";
        foreach ($params as $key => $val) {
            $this->errors[] = "Param $key: $val";
        }
        return $this->_forward('error');
    }