DOC, I found the problem.
I compared the installed codecs on my computer with a Win2k machine and found out that the Indeo Audio Software codec is not installed on my computer and I also found out the reason why.
Check the Ligos web iste: http://www.ligos.com/indeo.htm#xp
I quote:
"With the September 2002 update to Windows XP (known as Service Pack 1), Microsoft is no longer distributing any version of the Indeo codecs with its operating system. This only affects users with new PCs that are shipping with Windows XP Service Pack 1, or clean installs of Windows XP SP1 on an older system. Installation upgrades of SP1 and the use of Windows Update does not remove existing Indeo codecs from your system"
The reason why it works on your machine is because you probably installed SP1 after you installed XP.
My machine however is installed from scratch with a Windows XP SP1 installation CD and that's the reason why I don't have these codecs and the reason why I can't download them from the XP web site.
So the conclusion is; every user that has a new PC with Windows XP SP1 installed in the factory, will be unable to listen to your songs and also every user who installed XP using a Windows XP SP1 installation CD. At the moment these are just a minority, but you will hear more and more complaints in the future about users who will be unable to listen to your audio.
I thought you should know that 
Solution; don't use Indeo Codecs for your Wav files.
