Looking for firmware/model for my MP4

[Bred]

Hi everybody,

I'm looking for a firmware for my MP4 Player! But I don't know what model it is exactly about so I can't find the right firmware to download but I have few informations

the fact is that when I install MP3 player utility 5.09 (or 4.1 there is no informations of my current firmware when I launch "MP3 player upgrade tool"...

But few years ago I succeded to gain this informations : (don't remember what tool with)

-9.5.54 (? maybe the number of the firmware?)
-/qs_aK2025 (on a chip is written : AK2025C - SB10QAC 12N)
and I now there is a hynix chip for the memory.

-When I plug this device on my computer I can read "rock MP3"
-it looks like this


PS : My player "works" well but when I activate "shuffle", it just read 1 song and stop so this is not cool, that is the reason why I want t upgrade the firmware.
PS2 : you might notice that I'm not english but I'm hoping you'll understand me

Thank you for your help !