DVI-I doesn't detect my monitor, can I detect it in settings?

Hi, I have a small problem but a big problem for me.. So I bought the LED Samsunng SycnmasterEX1920X yesterday and I my video card is MSI n430gt... Is there anyway to reset my setting on the DVI-i port of my video card because when I plug my VGA to the Monitor and start up my PC it detects my monitor and in Nvidia Control Panel But If I plug my DVI-i and start up my PC... It doesn't detect my monitor even at the Nvidia Control Panel... Does anyone know what is my problem? Please.... Help me...Because I need to use the DVI-i to use Nvdia Scaling Aspect Ratio....
OS: Windows 7 64bit
Motherboard: Asus p7p55d-e pro
8gb ram
video card: MSI n430 Gt
Monitor: Samsung LED SyncMaster EX1920X
I use DVI-I to DVI-i Cable... Thanks.....
 
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