Uh-oh! Sounds like your upload failed. First line of attack: try re-uploading the file.
If you're willing to share information about the browser you're using and the file(s) giving you trouble, it will help us track down the problem. Write to us with the version of the browser you're using and the size and filetype of the audio file. If you can, include a link to the item and the name of the file. You can also email email@example.com.