Hi NamSong,
there's aprivate server app for download on ShipSim's homepage. See the following link:
http://shipsim.com/downloads/updates
When this website has opened, you may chose the SS2008 tag (above, in the middle). This will open a list with numerous uptates, the first one being the server app.
Best wishes
Volker
aka Eustache le Moff