Receber mensagem como cliente

[ThiagoLabM]

Hello how are you?
I'm using SimpleTCP to send messages to a device that is not a computer. It responds to a port that the SimpleTCP packet creates. The problem is that when I use Client_DataReceived some messages appear that a machine sends, but not others. How can I identify with the Client_DataReceived that I am receiving a message? or detect this action? I use Wirehark and I can see that I am getting responses.
If you can help I'm already very grateful.