Thank you for your answers. It was due of my firewall. MadCatX I would like to use Outgauge, but do I need to run insim server with the command /insim=40000 or do I have to run another server ?
When I run the InSim server, I have this message in the game : "Insim : insim : first byte in packet does not match".
I have already found a program which work. But it crash every time at this command : "outGaugeHandler = new OutGaugeHandler(port);". I think it is because the outgauge server does not exist but I do not know how to do it.