Ah, I see my wiki article for hosting servers have been quoted here

A few things for those with
Vista and wanting to host a Dawnspire server:
1) The game must not be installed under C:/Programs
If it, reinstall it somewhere else (preferably not in the C (partition of the) hard-drive, but at the very least in some other folder (like C:/Games/Dawnspire
If the game is installed under C:/Programs, Vista will scatter files around under other folder as it sees fit -> you won't be able to run a server. This btw is true for any other game too where you would want to host a server.
2) You must be logged on with Admin rights. Without admin rights Vista won't let the host work.
Other than that, hosting a Dawnspire serve is *not* difficult. And yet, if you are trying to set up a host from behind a firewall/router and you do not have a clue of what firewalls or routers do, you might very well be advised to stay well clear of hosting *any* game (not just Dawnspire

), as you might be able to do something you definitively didn't intend to do. At the very least read the manuals of your firewall and router, and don't forget to ask permission from the network admin (no matter if that network admin is your grandpa or your nephew, he *has to* be made aware of what you are doing

).