i upload mp3 file
everything is ok but play does not works

Kamilson, I know that I helped you out with this problem via email but for anyone else who is having the same problem this is the solution I found.

If you beats are not playing after you upload them, it may be because of the encoder used to bounce you tracks. There are conflicts with the LAME encoder. If you do encounter any problems like this then you can fix this simple by re-encoding yours mp3's again via iTunes. Once you upload them again, they should be working fine.

Please make sure ALL mp3's are encoded with a sample rate of 44.1Khz - if your sample rate is anything else, you may encounter more problems.

Hope this helps