I run the soldat server and get this:
Exception EIdCouldNotBindSocket in module soldatserver at 08076E4F.
Could not bind socket. Address and port are already in use.

Any ideas on what I need to do to fix it? I'm running slackware 10

Change the port you are trying to run the server on...

changed port to 2000, now it starts but won't let me join

Ah, there we go, added port 2000 and 2010 to firewall rules, and success!