Yeah!
I was solve this problem!
My solution (if who need
) :
1. Download this manual: http://www.hynix.com/datasheet/pdf/flash/HY27UG(08_16)4G(2_D)M_Series(Rev.0.7).pdf
2. Find WP pin on memory chip
3. Connect this pin to red wire (with disconnected accumulator)
4. Use mp3 upgrade tool
(Really, now i have any problems with my mp4, but this is any question
)
Sorry again for my bad english