Did you get a mini cd with the player? The software should be on that.
If you have the cd, install the program from that.. if not you can try this one >
http://www.mympxplayer.org/amv-conve...63-mb-df1.html
Just install the programs and use the MP3 Player Disk Tool
By the way.. are talking about just a 'mp3' player here or is it an mp4 player?