MyMPx.org - Firmware for Fake Sony S1 MP3 Player

Hi all,

I'm looking for a firmware for my fake sony s1 mp3 player.
Its like this:

http://xs221.xs.to/xs221/07451/img.jpg

http://xs121.xs.to/xs121/07451/img2.jpg
notice that's almost a classic s1 player, but this have 2 buttons on the front of the player.

I've tried almost all v9.XX.XX here, but the best i've had was to recognise as a mass storage.

Some details:

main chip: ATJ2091N
Memory: SAMSUNG 707 1GB
Board: JBL-515I-GC V 1.3 20070226

Display: 5 or 6 background-colors, monochromatic characters
When in ADFU Mode:
VID 10D6 - PID FF66

The firmwares that i've tried changed the PID to 1101 (PID of the mass storage) or something like this, so i think i was trying the wrong firmwares. As i said, some of these firm had me the mass storage, but the player won't show the menu when i put the battery, only the background color.

thanks all