fatal error maprot unavailable HELP!

[kinggamer1235]

I want to set up a server on my home pc so i can connect to it on the school pcs, but i get this error when turning on the ac_server.exe file in win_32
I haven't edited anything in servercmdline.txt so i dont know whats wrong, do i have to add the path to it if so how?

I am a complete noob so the server documentation just left me confused :)

Thanks for any help!