Well I have tried all of the tricks in the forum and it hasn't worked. But when it does start woeking this will be it. Oh and I'm using Win 7.
http://www.youtube.com/watch?v=0fSEjlLQcRY 
Copy the file to desktop.
Rename to title0 (file extention should be .mp3)
it should appear as title0.mp3
Place that new file into your 'sounds' subfolder in
the HTC folder.
If you've done all the steps in this thread, you've
probably done that by now. Try going in-game and
adjusting your sound options. Not only the 'music'
slider that should appear instantly, but also under
the 'advanced' sound options.
Hope this helps.