Dual DVI output to help desk bullpen monitors

Dual DVI output to help desk bullpen monitors

We are trying to replace an older thin client with a new D200. The older thin client feeds 2 large screen monitors in our NOC. When I insert those DVI cables into the D200 I get a message flashing on the monitor that says the signal frequency is out of range. When I plug in a 17" monitor I have to unplug both big screens, I can adjust display settings to 1440x900 but when as soon as I unplug the 17" the settings revert to Native and nothing on the NOC monitors. Any suggestions?