Need firmware for ZX-8051R (ATJ2171N)

[eMPe4]

I need firmware for:

ATJ2173N
Actions Player= ZX-8051R-TLSK-T-V1.3

Also see attached picture. The back of my player is silver, but is further identical to the one in the picture.

I managed to get the player recognized by Windows (XP), and tried several different other firmware packages but none of them worked. So i hope someone can help me out with the right firmware for my player.

Thanks in advance.