Shoutbox

Try some of the solutions from this guide, found on Google;

http://www.codecguide.com/fix_for_flash_sound_problems.htm

Hope you can fix your problem, if none of these work, let me know and i'll continue to try and help

EDIT: I would remove or roll back the effects of that registry file of your's before attempting to fix your problem. Leaving it in place could hinder you.