The Logic Off Topic list

http://www.redbullmusicacademy.com/DIARIES.18.0.html? 
act_aced=113&act_dpid=91

The redbullmusicacademy site has footage of the seminars they have at  
the annual conference. I desperately want to watch this but there is no  
sound. The video is playing. The visuals are working but no sound.  
Quicktime works playing audio files.
I upgraded my quicktime software and everything else. It's opening from  
within 'safari'.
I'm on a G5 dual 1.8 OS 10.3.9. Any ideas?
Roman.