"The process of flashing must to begin"

[Respirator]

I am pretty sure that I did everything right but apparently I didn't.

I followed the manual but when I release option button after connecting it to pc nothing happened, no flashing or anything. I tried few times but it doesn't work. Any idea what am I doing wrong?

5) Be sured that your X3 is totally charged. Turn it OFF and unplug the USB cable.
6) Run the script C:\xDuoo\Flash_Rockbox.bat (or C:\xDuoo\Flash_Stock.bat to return to the stock firmware);
7) Press and hold the button "OPTION" pressed;
Plug the USB cable connected to PC to X3 then release the button “OPTION”
9) Install the driver for JZ4760 USB Boot if you didn’t install it previously. It is available here: C:\xDuoo\Drivers;
10) The process of flashing must to begin. If it doesn’t start, unplug the USB cable and reset the player. Try flash it again (see prev. 5-8 points) The flashing lasts about 2-3 minutes.

[saratoga]

From Google I think you are asking about the instructions on this page:

http://xvtx.ru/rockbox/manual.htm

You should ask there.