Plutonium

when we want to play zombies and we are both connected to the game, I appear to him as if I am offline but he appears connected to me, he has to join me because he does not have a good internet to be a host, please help

Resxt okey thanks, and I have another question, how can I play private matches with my friends??

Resxt yeah my bad, a gsc file, when i put a certain gsc file in the t6r folder and launch the game, when i create a custom match I have this error, the gsc file that I cannot use is this:

and in the gametypes folder it has this files:

when i want to use a certain csg file in private match I got this error, someone know how to fix it? thanks