Mediacaster and Mp3

I installed MediaCaster plug in and see the dropdown and browse options in my edit post page but once I insert mp3 file, nothing show up when I visit the post in my browser.

Is this only something that only Ipod users can see or would it also work in browsers?

Here is the syntax [media:loving_.mp3]

I even tried the full path to the file [media:http://www.mysite.com/blog/media/2009/07/28/12/loving_mp3%5D

And also tried
I even tried the full path to the file [media:http://www.mysite.com/blog/media/2009/07/28/12/%5D

Thanks
Dave