NuGardt Software

when ever i go to play a demo it closes me game on me and says cant create dvar player_dmgtimer_timeperpoint : 1280 dvars already exist...PLEASE HELP ME

Have a look at this topic:
http://www.planetquake3.net/forum/viewtopic.php?t=1729

I have problems with this too, and when i open that link, nothing in on it so... can anyone help me ?