if you want to test that on one pc just run server.bat and then client.bat but inside of it there must be multiplayer11.exe -cl -ip localhost

on the other hand if you want to run it over internet just run server.bat on your pc with commands: multiplayer11.exe -sv -cl -port 2300 and before that you must forward the port 2300 on your router. i have experienced some problems with nod32 smart security - it blocked incoming connections for 3dgs, dplay8 and some other things.

i hope you understood what i have told you here