I don't have any sound and can't adjust the brightness Macbook Pro Mid 2009 with Windows 7 64bit

I installed Windows 7 Professional 64 bit in my Macbook Pro Mid 2009 using Bootcamp 5.1.2 and from the beginning the sound is not working and cant adjust the brightness either. Tried installing all the drivers that people recommended from Realtek, nVidia and nothing has help me fixed the problem. is there a way that i could fix those problems?

Look in the Boot Camp system requirements located here: http://support.apple.com/kb/HT5634
Find your computer model and year. I think you will find that you should be using version 4 of the Windows support software.
MacBook Pro
(13-inch, Mid 2009)
4
4
DVD
DVD
DVD
MacBook Pro
(15-inch, 2.53 GHz, Mid 2009)
4
4
DVD
DVD
DVD
MacBook Pro
(15-inch, Mid 2009)
4
4
DVD
DVD
DVD
MacBook Pro
(17-inch, Mid 2009)
4
4
DVD
DVD
DVD

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