Have you installed the UT2004RPG.ini sample that's included with the 200 distribution? I can only vouch for the stability in a dedicated server environ, and what you're seeing there makes me suspect a munged or missing INI file.
You might also be experiencing some issues with not having DruidsRPG200 or UT2004RPG properly installed - make sure they're in your UT2004.ini's ServerPackages area, as per the readme in the distro.