VOSTO 3700 VIDEO and AUDIO DRIVER issues

Hello there.

I got Vostro 3700 and I fresh installed and tried to install the driver, it dosn't work as i expected.

VOSTRO 3700

Video: Nvidia GT 330M

Audio : Nvidia and IDT (I don't know why it has 2 audio device builted in)

WIndows 7 (x64)

That's what i want to..

VIDEO: Nvidia GT 330M - Discreet Mode 

AUDIO : HD AUDIO

1. DRiver ID : 292774 download and install

when i tried to install Nvidia GT 330M - Discreet Mode, it didn't recognize the Video, only HD Audio..

2. Download from Nvidia Website..In the bigining of process, it says that "Install cannot continue" This graphic driver could not find compatible graphics hardware

I talked with dell support technition he doesn't know why it doesn't recognize my devices...

Please help me out..

thanks in advance.