Can't make FN Keys to work!

Hello, I need your help, I'm desperated
I have a VAIO SZ3 an I decided yo make a win vista clean install, I installed all drivers and everything works correctly except the FN+brightness or FN+ any combination. But misteriously FN+volume and mute works, I don't know why.
I also realized that when I switch the button of speed and stamina the window that ask you if restart does not apear.
I think I tried everything.
please help me!!

thank you very much

 

Source: http://www.geek.com/forums/topic/sony-vaio-fn-keys-no-longer-work

1. Download the Full Utilities Package from the Sony site for Vista (go to support.vaio.co.uk, enter your model details and select Win Vista, Click the 'Origionally installed' link below the heading Popular Articles and Links, and download the file 'Origional Utilities Package' its about 70 meg.
2. Install VAIO Event Service
3. Reboot
4. Install Sony Utils DLL (Called Utils Installer 1 SonyUtils DLL in the zip archive)
5. Reboot
6. Install Sony Shared Library (Called Installer 2 Sony Shared Library in zip archive)
7. Reboot and it should be working

 

I installed correctly all the drivers and it is impossible, but i don't know why FN+volume keys works!
Also I installed Vaio smart network utility to turn off bluetooth and it sais that wireless and bluetooth are not detected, but they are working correctly because I can surf the web.
it could be something about the chipset?

 

Hi Mine FN keys not working brightness up and down
but num lock scroll lock working and I dont need to hold down fn key while wolume is pressed ..
for fn i have bright.+ bright. - magnifier+ and - , baterry sleep i think, pause , break, scr lk that's all for Fn..
brightness not working beacuse there is that vaio utilities soft and when is installed I have S1 and S2 key and AV Mode and with S1 key I can set brightness 100% or 50% ...
Please tell me your full model number of vaio laptop ..
download this chipset driver: http://drivers.softpedia.com/progDownload/MSI-PX200-Chipset-Driver-8701007-WHQL-Download-67614.html
there are 3 mirrors pick up one