Looks like you dont have the Epic 3204 patch. Remove you chaosut2.ini and chaosut2user.ini, apply the Epic patch and it should work for you. Let us know.
After installing the patch delete the ChaosUT2.ini and ChaosUT2user.ini in your UT2004\ChaosUT2\System folder. Restarting UT2004 should re-create those files from scratch and have them work.
I make Darth Vader look like a teenage punk with a lightsaber.