I received this response

** Response (Matt Ko)** 07/01/2009 10:02 AM Do you have a nonstandard audio setup?

There was someone else who experienced a similar issue in Poser 7 where the WAV file would work perfectly fine when I test it on my end. It turned out that the person was using a nonstandard audio setup (in particular they were using an audio splitter that was causing the problems - after removing the splitter, everything worked fine again).

So if you have a nonstandard audio setup, you should remove the nonstandard components and test it only with a standard setup.

You should also test it using one of the WAV files that come with your Poser installation rather than using a WAV file from a different source. If the WAV files that come with the Poser installation work fine, but your third party WAV files do not, then that would provide some additional information about the problem.