when I try to turn on my garmin 255w, it appeared the screen of garmin and reset indefinitely.

I went online and read several posts (like this in portuguese:

[Only registered and activated users can see links. ])

I downloaded the g7towin, and information from my gps were as follows:

nüvi 2 Series Software Version 6.10 ID: 827
Unit ID: 3718 ....... etc. .....; USB Comm via Bulk Pipe

so i download the package to "Nuvi 2X5 ID 827" from
[Only registered and activated users can see links. ]

i run the update.exe and it updated my garmin, but when I finished the update and restart my garmin, i have the same reset indefinitely ... he was still showing the logo of garmin and resetting the device.

so, i try others firmwares...until I installed one of them (can not remember which it was) and Now, when running g7towin,

it's the following error message:

USB Error: open_garmin_usb: failed getting USB handle
ID: 0 Unit ID: 0 USB via Bulk Pipe Comm

and now i cant access by preboot mode.
=(


how i can update/re-write firmware with this usb error and if i cant access my garmin by preboot mode?


(sorry for my bad english)

Adriano