What about system sounds? I'm going to presume you're running KDE (Mandy's default desktop environment)... so do you get a nice little ditty played to you when you login? If so, then the problem is with the games configuration. If not, then there's something going awry with your s/c setup. The C-Media 8738 (IIRC) is normally an on-board EISA 'card'... so you should try running sndconfig.