Updated the firmware of the MSI's Megastick 511 and now it doesn't work, help please!

I recently bought Megastick 511.
My problem is the following, I downloaded the following firmware update
from MSI's official site:

ms5511V3.0.6withFM.zip
Then, following the instructions in the manual, I pressed the button
when connection the player

to the computer.
Without releasing it, I openend the device window at system and saw the
Recovery something device

was listed.
So I realeased the button, unzipped the files in the firmware's zip
file and overwrited the files

on the MSI program's folder.
Then, loaded the update program, saw that the version of the firmware
to be installed was newer

than the one on the player, so I proceded with the update, with the
format option enabled.

After the proccess finished, without any visible errors, the mp3 showed
"connected" on the

display.
I disconected it (via software first), reconnected it and nothing,
windows didn't detected, the

mp3 was dead, nothing on the display.

I reconected it with the "play" button pressed.
Nothing.
Tried on another USB, on another pc, both times with and without
pressing the button, and

nothing.
Changed the battery even.
Totally dead.

Can anyone PLEASE help me solve this problem? I don't wanna lose all
the money I used on this

beauty.
Thanks.