protected function _authCheck($ticket)
	{
		$errnum = 0;
		$errmsg = '';

		if ($arr = $this->_fetch($this->_query("
			SELECT
				quickbooks_ticket_id
			FROM
				" . $this->_mapTableName(QUICKBOOKS_DRIVER_SQL_TICKETTABLE) . "
			WHERE
				ticket = '" . $this->_escape($ticket) . "' AND
				touch_datetime > '" . date('Y-m-d H:i:s', time() - QUICKBOOKS_TIMEOUT) . "' ", $errnum, $errmsg, 0, 1)))
		{
			$this->_query("
				UPDATE
					" . $this->_mapTableName(QUICKBOOKS_DRIVER_SQL_TICKETTABLE) . "
				SET
					touch_datetime = '" . date('Y-m-d H:i:s') . "'
				WHERE
					quickbooks_ticket_id = " . $arr['quickbooks_ticket_id'], $errnum, $errmsg);

			return true;
		}

		return false;
	}