Some more information would be helpfull.
What where you doing at the time?
What OS do you use? And what version?
The version number of the player?
Did you try another programm?
You can try downloading a new installer and install over your current version.
You can try uninstalling and reinstalling your player.
Ho! By the way, it's an MP3 player PROGRAMM, does it...
If it's a DEVICE that can play MP3s, then you should post in:
Audio, MP3 Players.
Anyway, even there, you should provide more informations, like: Exact model, what where you doing at the time, if it's when transfering a file, how large was it,...
Electro, May 2011