Bootcamp screen brightness does not work.

Hello, i can't adjust my screen brightness at all.... I hit the fn and f2/f1 buttons and the brightness icon appears and the bar goes down and up normally but the screen brightness does not change. i also tried changing the brightness in the bootcamp control panel and nothing happens. I can't find any solution for this problem anywhere, so I figured i'd give it a try and ask here how can i fix this.
I'm using: Windows 7 - x64 on a macbook pro 2009 with bootcamp updated to version 3.3.
Thanks

Click on the start icon (bottom left of your screen) and search "Brightness" click on the adjust brightness thing. Hope this helped.

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