Okay, the game is up and running. I had to start the game on my local computer and then transfer the files to the server because somehow it was not possible to start the game remotely.
Everybody should have received an email from the server where it is detailed how to connect to the game. If you haven't, please check your spam folders and whitelist the sender!
The final mod that we are using is here:
http://www.mediafire.com/?11b0zcymhem