Wifi Shield firmware Update

Hello, I follow the tutorial ( Arduino - WiFiShieldFirmwareUpgrading) for Upgrading Arduino Wifi Shield and got an error:

Upgrade WiFi Shield firmware

Error opening the file.
Something went wrong with creating the memory image.

Any Clues on how to solve it? Now I test Wifi Scan with my wifi Shield and it doesn't work (It was working).

Bests!

(deleted)

I Updated my post to make it more complete.

This tutorial: Arduino - WiFiShieldFirmwareUpgrading
Arduino Original Wifi Shield
Im Using Arduino UNO but is not relevant I think.
I have tried that tutorial and search a lot more on the internet with no success.

Here is the exact error I got on Terminal, it is a copy paste:

Upgrade WiFi Shield firmware

Error opening the file.
Something went wrong with creating the memory image.

Done. Remove the J3 jumper and press the RESET button on the shield.
Thank you!

Please someone help with this!

I echo everyone on this problem.

avrdude: stk500_recv(): programmer is not responding

test uno with blink sketch -= works fine
changed USB cable
this is the second wifi shield = some out there (Arduino staff) please send us the solution. I have have had the unit for 3 weeks and getting a bit tired of reading the forums with no helpful answers.

Many thanks,

Please I need to solve this, my Wifi Shield is not working.