I had the same problem then I saw that . (scuse for language I'm french)
you must do exactly the same procedure.
=> 5. Put device on recovery mode (short-circuit) <=
http://www.s1mp3.org/en/docs_deadrec.php
You must open your MP3 and ...
When you connect your mp3 to PC touch 2 or more of any of the 8 IO legs of the memory chip like the Photo.
http://img207.imageshack.us/img207/1504/52qd.jpg
And the sowtware upgrade can see rock usb device .