Viewsonic VX2035 DVI problem

[Revolution09]

I just got my new monitor, a Viewsonic VX2035. It works fine on Analog (VGA) however when I hook it up to DVI (which I'd rather use obviously) all I get is a "no signal" error on the monitor and no picture at all. I'm running an integrated GeForce 6150 on my Asus A8N-VM CSM mobo. Any help is appreciated! Thanks