How to create a server that communicates with SAP

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C#

VB

SAP

Hello, I want to make an application to simulate a Zebra printer, namely an application server, which takes data sent from SAP were to be sent to the printer.

IP printer is 10.238.115.xx
net under 255.255.255.0
Gateway: 10.238.115.xxx

I tried :
    TcpListener server = new TcpListener (IPAddress.Parse ("10.238.115.xx"), 9100);
but when I try to start my server marker error appears, and tells me that IP is invalid, but if you connect the printer and then give 10.238.115.xx ping is ok

What I have tried:

TcpListener server = new TcpListener (IPAddress.Parse ("10.238.115.xx"), 9100);
but