I have a dual monitor rig that I'd like to use. I have an AIW Radeon 9800 and another Radeon X1550 card. When I install ATT, I can manipulate the monitor attached to the AIW card, but the X1550 card does not show up. Even when I go the "Display Settings" the "on/off" switch is greyed out. Any help would be appreciated. Thanks in advance.