RTCW, Quake III, no sound

Hi, I have just installed RTCW, Quake III, under SuSE 8, - also fresh installed - and I have no sound. The rest of the sound it is working great, mp3, mplayer, etc, all but these two games. If I am runing Winex, these two games are sound, so only native executables are broken... How to fix that ?