MP3 files not playing through http in windows media services

Dear Team,

I have installed windows media services in my windows 2003 server and it has been configured. Now I am able to stream the .wmv files through http but not able to stream .mp3 files through http. Herewith I have given the link for your reference. Please check and advise.

WMV File:

http://66.201.116.8:8000/pinball.wmv

MP3 File:

Please let me know what I have done wrong.

Please Help!!!

Thank you,