i have a ati 5450 it has 1 vga 1 dvi and 1 hdmi i want to run muli monitors but all i have is vga lcds i bought a dvi to vga adapter and what im doing is using a dvi cable to connect to my video card and the adapter to the monitor pluged everything in and the monitor on the dvi goes blank what i want to know is will this setup work or not or do i just have a defective part