Media Elements Issue

I’m trying to use the Media Elements plugin which seems to be amazing, but I’ve been running into issues.

http://leapfrogwebmarketing.com/clients/jwill/?page_id=9

I’m trying to add an audio track to this page, and have used the following code

[audio mp3="http://leapfrogwebmarketing.com/clients/jwill/wp-content/uploads/2011/01/jwill_demo.mp3"]

I’ve also tried removing the full address and just have

[audio mp3="jwill_demo.mp3"]

as well as

[audio src="http://leapfrogwebmarketing.com/clients/jwill/wp-content/uploads/2011/01/jwill_demo.mp3"]

but have had no luck. It seems like I’m doing it properly, and the plugin appears to be very simple to use… but its not working. Any thoughts?

Thanks!