So I installed firepro w600 card on to my system that is using Windows 7 x86. How I would like to set it up is: 7 monitors, 5 using firepro (minidp to hdmi) and 2 using startech usb to vga. When I have everything set up, I cannot "extend the desktop" to the 7th monitor. The system detects it but will not enable it. Any ideas? Would be greatful for any help.