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Hi,
you asked your question in comments - not a good place to ask for support. Better start a forum post with appropriate subject.
When you upgrade module it is not enough to upload new files, you need also to go to admin -> modules and click "Update" for the module. Some modules may require extra steps - always helpfull to check the upgrade path in the modules readme.
As for the problems with upload - there could be diferent risons for that. For example there could be a problem with web server or PHP configs, MP3 may not be allowed tipe for upload,...
Try to enable PHPDebug (try both styles) before trying to upload and look for errors. Also if you have access to server logs look there.