DEVO10 flashing deviation-devo12-v4.0.1

I was try to flash the deviation-devo12-v4.0.1 to my DEVO10, but after finish upgrade I turn off my devo10 and try to get into the USB mode...but it's not work.. I can't turn it on again..
Am I do a stupid work?.. can I return it to deviation-devo10?

Edit: I misread your first post, I didn't see you tried the wrong file. Follow PB's instructions and start new, it'll be fine.

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When you try to turn it on what exactly happens?

Does the computer recognize it as a USB drive? It should, if it took the flash correctly it won't boot till it's formatted and the new file system loaded.
Try this:
* Tx off, plug in USB between it and computer.
* Hold ENT, switch on TX
* computer should recognize it as USB drive
* Format it. Use default settings
* copy needed files/directories from the .zip into the root of the USB drive
* "Eject" USB drive
* Switch Tx off
* Switch back on with no buttons pressed (cable may be in place or removed for this, no difference). It should boot.

I have follow your guide to flash it back to deviation10, unplug the battery, wait 10seconds, plug in the battery, power up while holding EXT.
Thank you very much !
My Devo10 is back!