private void sendAck(COMMAND cmd, boolean success) {
		try {
			COMMAND msgCmd = (success ? cmd : COMMAND.BLANK);
			Message msg = new Message(true, msgCmd, 1, "", new byte[1][0]);
			
			objectToClient.writeObject(msg);
			objectToClient.flush();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}