The new version of Divx (5) does not include the audio compressor. All you have to do is go to the site and download the audio compressor...I ran into the same trouble but my friend told me to get the audio compressor.
maybe a moderator should stick a thread about the Divx 3.11a somewhere, ie the tech section.
or maybe a link in the cic to the codec and how to install it.
You mean like all the threads about this exact same problem that have been asked recently that take a total of five minutes of browsing to pull up multiple examples?