well, thats not a big deal...
If u have Windows I can help you
-open "server_wizard.bat" in ur AC-folder
-Server description: we use |RC|Server #X (X= a number, next Server would be #3)
- max client: difficult to say, too much can make the server laggy. firstly try 12. if it works fine u can make more, if works not fine make less players
-admin pw of course (if RC pls contact me cause of the pw)
-all other things u can simply skip by pressing enter
If now it says at the end "registration successfull" u host a server. congrats
If there is something else u failed (could not ping u, fatal error...), the 2 mainly probs is that the firewall is blocking you, or u don't have the ports opened (28763)
Try it again without firewall (or make sure firewall doesn't block this), and open the port u using for ur server (if u skipped server port it is 28763)
If the ports are free and the firewall doesn't block, but u keep have an error or sth like this I can't help you.....
So, gl by hosting