running servers for networked games

Hi

I'm working on a school project where I want to be able to test my game, which is a multiplayer game. I'm using a dedicated server for this, but want to make the game run from a bat file or somehow make it part of the services/system.

I used this: C:\Users\frank\Documents\SCHOOLGAME\GAME.exe -batchmode -nographics

but I get an error = "-batchmode" command line argument is only available when publishing using Unity Pro."

How do other people achieve this?