To [MiA] Raj,Thanks, Raj. But I don't think that is my problem. Besides, my UT2004.exe works fine. I have the Editor's Choice Edition Unreal Tournament 2004. It had the other mods installed in the game (like FragOps, Domain, ChaosUT2, Red Orchestra, AirBucaneer) which work fine. Only KFMod20 gets the error message. Error message is picture below:Doesn't it point to the player start (KFhuman spawn) as the problem? I don't know. I even downloaded the KFMod20 from your link, and installed that.