A "MP3" can hold any number of bitrates, CBR or VBR and not all players can handle ALL MP3s. Try this. Put a MP3 that's encoded in a way that's compatible with your Sony into it's memory and re-test.
Seeing the technical spec's of the Sony Mp3 Player NW-E016F, i bought it. Spec's showed that it play's back Mp3, WMA and WAV files. I copied a few my Mp3 collection from the Pc to the player VIA the USB (obviously) and tried playing them......wudn't play, showed an error message ' NO DATA '. I know it will play when it is transfered with the SonicStage Software which came with the product.
Can i get the device to play Mp3 files directly ?
Thanks in advance.