Follow this steps and everything should work:
1.- format your player (right click --> format)
2.- download the player's files from
HERE, and drag them into the player. (disconnect your mp3 player from the computer afterwards)
3.- download the music management software from
HERE, and install the software, (for best results install the software after a fresh install of WMP10 or RealPlayer)
note: always reboot as promted
4.- Connect your player, open WMP10 go to Sync and start using your player.
here's a very useful tip: after synchronizing your music, open your player and browse musicsystemdata (this folders are hidden by default) you should see 15 files, copy them and save them in your PC and/or create a new folder in your player and save them there. Now whenever your player have some problem not playing your mp3, replace those files in systemdata with the files you save, this will restore your player settings without having to format.