Oh my stupidity.. Firmware gone..
 

From the start, i must apologize for my weak english.

All i wanted, is to have a backup copy of my firmware.
Just didn`t reach even first step - discover hidden partition.
First no rkusb.tag or teclast.sys or FRK.TAG or wisky.sys worked for me.

Then i saw something saying about RK27DM.exe. and RockUSB.
Trough device manager installed rockusb files. But hidden partition didnt apear.
The i tried RK27DM.exe and pushed the restore button... No hidden partition, and unformated main prtition.

Now i even dont know what firmware to searh. Yet on RK27DM.exe it said [ rk27 sdk version 2.2 loader 4.14 ].
I dont know what player i have. I bought it here - EBAY

Can anybody direct me where to start?

Firmware
 

You have a Rockchip RK27xx-based player (xx - two numbers)
Go to the Google Pictures,
type "RK27xx" (replace xx by two numbers -
figure out what model of chip you have;
if you don't want to open your player because of warranty,
try to guess or search for "RK27")
and search for the player with the similar main menu.
And then try to find the firmware for this player
and install it to your player.

It looks something like this http://www.forise.com/webadmin/uploa...3161743962.jpg
So i think it`s RK2706 And plus, i opend it, threre was writen RK2706B

Only this player is 4.3 inch, but mine is 4.7 inch with touch screen. And yet music player looks the same as mine was. Now whitch firmware i shoud look for?

I downloaded this one:Download Rockchip Firmware: RK2706 - T8 Clone - MyMPx

But had a lot of problems installing. One time there was only raw formated device. Then, somehow i installed the wrong firmware, and there was rainbow screen. Then i deleted all the partition with partitioning tool. But the rainbow screen apeard again when i connected to pc. It is quite frustrating.

Actualy there was one time when apeard all three partitions. The hidden, the main and third for microSD card. But i tried to ovewrite all files in hidden partition with the firmware i downloaded. And from then, i have a one raw partition again.

It is difficult for me to download more than few of firmware, as i have only slow mobile internet connection. Can someone pinpoint which one it is?

Oh, theres one more thing. If you have latest windows xp version you cant turn of auto drivers install, and cant install rockusb27 driver. I just keep feeling lucky...