This is a nice and detailed tutorial but a very important step missed.
In order to update the firmware "
the player should be recognized by the computer" first. I mean your computer should allocate a drive letter to the player and you should see it under My Computer as a USB disk. Because it is not written clearly, I end up trying all the firmware versions for many hours, but it always stucked during flashing process with MP3 Player Utilities - Upgrade tool. It was just saying "
downloading restorable main program". I realized that when I first saw the
Update the firmware for your MP3/MP4 player tutorial written by admin.
Just a note...