Windows 7 Multiple Displays

Hi There

I Currently Have A Nvidia 9800 GX2 and i am trying to duplicate displays over my computer monitor and a projector in another room to watch films on. both the projector and monitor have shown up in the nvidia control panel and the windows 7 "personalisation" options i can get the monitor and projector to extend the desktop but for some reason when i choose the duplicate option from the drop down list and hit apply it comes up saying unable to save display settings. I have tried dropping the resolution of both the monitor and projector to 1024 x 768 and also have got the most recent display drivers from the nvidia website. but still no luck. any help would be appreciated. ohh and both displays are connected via VGA cables

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