UltraStudio Mini Recorder Problem

Hi,

I am running Windows 7 on a MacBook Pro and my UltraStudio Mini Recorder works fine with one problem: when it is connected, my computer thinks it is a second display! It still works for capture, but I think the combination of attempting to output to the second imaginary monitor and running the video capture device is really taxing things, and I'd like to fix it so it just sees it as a capture device, not as a display. Any thoughts?

Thanks for your help.