private function _load()
    {
        $options = array(
            'host' => $this->_host,
            'port' => $this->_port,
            'username' => $this->_user,
            'secret' => $this->_pass,
            'connect_timeout' => $this->_connect_timeout,
            'read_timeout' => $this->_read_timeout
        );
        $this->_ami = new ClientImpl($options);
        $this->_init = true;
    }