Why can't I hear sound with divx?

Guiboys

New member
I try to watch a movie and it says it has an error
"You may need an additional audio decoder to play the soundtrack of this file.

This file contains a track in the Dolby AC3 Audio (code "8192") format. You may need to install a DirectShow decoder for this audio format in order to hear the soundtrack of this file."
I downloaded the full ivx player and it says it should have one but it won't work.
 
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