I just purchased a VisionTek Radeon HD 7750 Eye 6 card to put into a HP Pavillion Elite HPE so that we can display data on six screens. We can currently only use screens in two of the six ports. Windows 7 (fully patched) sees five screens (there may be a cabling issue with the sixth, that's my issue). But any time I attempt to extend the desktop to a third (or more) screen, it will not let me. Additionally, the Display section of the Radeon Settings control panel only shows two displays. What am I missing?