I think I have fixed the problem of the Disney mix stick not being recognized by thecomputer, or Win Media Player.
I had the same problem for about 8 months now and today I thought I would give it another chance and what I did worked.
First, I put the mix stick into my USB port
Then I went to c:\programs\Disney\Mix stick and there was a file called stupdaterapp, Disney Mix Stick Firmware Download Disney, I doubled clicked that and it started downloading, it was the same ver. firmware I already had but I clicked ok anyway, then when it asks you if you want to Format click yes.
When it finished I went to windows explore and the disney mix stick would let me drag and drop new music files on it and when I took it out, after ejecting it, the mix stick worked, it plays music again, I thanked God, I was about ready to just throw it away because it would not work at all it just flashed that light it has on it, and my computer did not recognize it at all, but after this it works and my grandaughter was so happy !
Please, if this works pass this fix on to everyone, there are alot of people out there with the same problem and maybe this will help them, there is no way I could go to every web site and post this.
Good Luck & God Bless !
P.S. Let me know if this helped anyone! my e-mail address is firstname.lastname@example.org