If your music file is not working, can you please take a look at your music file name? Does your music file have special characters in them? This is most likely the reason why your music file is not working well. Please rename your file so that it just contains plain text with no accents, ( ) or symbols.
Please follow these steps to rename your file:
1. In your Sitebuilder, go to Files.
2. Right-click on the file in the File Manager. Click Rename.
3. Delete the file name but remember to leave the extension (e.g. .mp3).
4. Enter a new file name before the extension.
5. Click OK.
Once you have renamed your file, please try re-adding your music file to your page using the MP3 widget.