mp3 link without writing http://www.

Hey..

I would like to know how i can link to the player without writing the full url to the file.. Currently I have my songs in a folder structure like this http://ww.demo.com/mp3/test/12345.mp3 and when I use [audio:/mp3/test/12345.mp3] this code, it says file not found, and i have verified the “Default audio folder location” to /mp3/.

http://wordpress.org/plugins/audio-player/