samsung a900 doesn't play my mp3 music?

[makana]

hi people yes, my new cellphone doesn't play mp3 music. i download it to my cell but i get this "unsurpported document format by fileviewer" also it doesn't show on my mass-storage(media player-mass Storage). But it show on (Tools-Mass Storage-File Manager) here can see it but it will promt a the messege above.

[mcastlejr]

I have a900 and I play my mp3s from the media player-mass storage. Maybe this will help you: "Copy your mp3s, mp4s, m4as, aacs, or wav files to the Media folder on your phone. Do not put them in the db folder. You can put them in their own folder within the Media folder but they will be treated as seperate playlists, meaning if you play a song from the Media folder and select shuffle, it will not play songs from the Media/Album folder. Use Media Player -> Mass Storage to play the music."