Opening mp3 files !!

[cool_paki]

I have copied some mp3 files in jam. Before it was opening directly with media player whenever I tap on the mp3 file. But now it stops opening those file with media player, and now whenever I click on the file it give this error message:

"There is no application associated with "Filename". Run the application first, then open this file from within the application."

Now everytime I have to open media player first then only I can play the file. What should I do so that whenever I click it should directly open with media player?

[grumble]

Have you installed another player program (GSPlayer, Mort Player etc.) then removed it ?
It sounds like you have, the file association has been lost

[cool_paki]

YES, I have installed some other player and then removed. From that time I am facing this problem. So how can I resolve this problem?