hongen

Hi people i a new members to this site dosent exacly know the rulse how to ask and things. but i got a problem with my NW-E002F mp3 sony player when i put my music in like other random mp3 player, it can not find the file and play upp it .. and i have update it o 2.1 or 2.0 .. the question is how do i do so it play up my music!!??' /..English