I couldn't replicate your problem with other amazons3 hosted mp3 files.
The plugin doesnt work only with your links, i tried 10 more and it plays them without any problem.
Here is link where i have put your link and my link on same page (yours is the first one and doesnt play).
Here is link to an image of how your permissions and meta-data needs to be set in your amazons3 properties for each file.
Other than that i cant help much, as i said it works with my s3 links without any issue so the problem is not in the plugin itself.