I just received my new Studio 9100 with a ATI Radeon HD5670 1GB video card. The documentation on the card says that it has three independent display controllers and will Drive three displays simultaneously with independent resolutions, refresh rates, color controls, and video overlays. I also purchased 3 Dell ST2310 monitors that have the same inputs connections as the ATI Radeon HD5670 1GB video card output connections. When I hocked up the monitors only 2 will display video. I have tested and all 3 monitors work. When all 3 monitors are connected to the computer, the monitors with the HDMI and DVI connections will display. The VGA output will only work when one of the other connections are disconnected. Windows recognized that there is three monitors but will only let you configure 2 of them. I am not using this computer for playing games but to do stock trading. I need to be able to have different charts running on the different monitors. Thanks in advance for the help.

Jim