I applied a long time ago a solution like this one but the file used was old and even when the problem was resolved I got new problems with other applications: WMPlayer and PocketDivx. So I went back to my original file.
Today, somebody sent me a file to resolve this problem.
All you have to do is uncompress the file, and copy the wavedev.dll in \windows folder of your ipaq, soft reset and that's it.
I posted the file in my site.
File to be copied