private function _loadExistingController()
    {
        $file = $this->_controllerPath.ucfirst($this->_url[0]).'.php';

        if (!file_exists($file)) {
            $this->_error();

            return false;
        }
        require $file;

        $namespace = str_replace('/', '\\', APP.'/Controllers/');
        $className = $namespace.$this->_url[0];

        $this->_controller = new $className();

        return true;
    }