Windows 7 Screen brightness pb

[bis31]

Hi everybody !
First, sorry for my english but i come from belgium

I have a W7 Pro & a HP 6730s. My W7 works fine but there's just one annoying problem, when i'm trying to adjust display brightness, (with FN + F7 ; FN + F8) nothing happens. I installed the last driver (Intel graphics media accelerator driver for mobile) (Mobile Intel 4 Series Express Chipset Family) but it doens't change. The lightness is still at the maximum. (I don't have the brightness option in Windows Mobility Center)


Can you help me ?

Thank you.
Best regards,
Quentin

 

[bis31]

Oh and I have the build 7600. So no brightness slider. ;-)