No data. can't play music. - Sony Network Walkman NW-E105

record your music in the correct format for the unit

http://support.casio.com/pdf/008/AP620_6_E_1A_web.pdf
E-48
Using a Memory Card
You can use the procedure below to play back a user
song (page E-24) stored on
a memory card without
loading the song into Digital Piano memory.
Memory Card Folders
Formatting a memory card on the Digital Piano will
automatically create the four
folders shown below. You
put playback song data into any one of the folders. You
can use the four folders to group your music data by
family member, genre, or some other categories. Use
buttons
through (folders) to select a folder.
1.Store the music data you want to play back in
one of the memory card folders.
2.Insert the memory ca
rd into the Digital
Piano's memory card slot.
3.Press the (CARD/INTERNAL) button.
4.Press one of the folder selection buttons (
through
) to select the card folder you want.
This will display the song number and song
name of the first song in the folder you
selected.
5.Use the (w,q) buttons to select the
song you want.
6.Press the (PLAY/STOP
) button.This will start playback.
•Each press of (PLAY/STOP) starts and stops
playback.
•Fast forward, fast reverse,
tempo changes, and other
operations are the same as
those during playback of a
user song in Digital Pian
o memory. For details, see
"Playing Back a Specific
Music Library Song" (page
E-24).
7.
To quit memory card data playback, press the
(CARD/INTERNAL) button.

When your downloading music the mp3 player must completely write the data files completely onto it. Your mp3 player must not. Try downloading the data of the songs over. And do not mess with the process such as playing music on the computer or Doing anything else on the computer as well. I hope this helps.

It seems your memory almost full already. Delete some unnecessary data in your memory cards and restart your music. If problem persist, you may have problem with your card.

pls format the Ipod and reinstall the music and check it

Probably you are syncing incompatible file formats.

Please refer to your manual for the supported formats

ne demarre pas en mode sans echec

I TRY TO PLAY MUSIC AND IT SAYS NO DATA BASE FOUND

Sounds like the cd player is defective. Other data programs will take the data at what ever speed the cd will produce, within reason. does the speed change when playing music?