Secondary monitor corrupted display w/6800GT

I've got an Nvidia GeForce 6800GT (256mb) and I'm having a new problem with dual displays. I hooked up a second monitor to it the other day and tried to park a set of gauges on monitor #2 while using the primary for the VC view. When I do that, the secondary screen display gets corrupted; it's almost as if the horizontal image is separated by scan line, with half of them being placed next to the other half horizontally. The end result is that the gauge is not very readable and totally un-clickable. I'd post a screenshot but to my disgust when I tried printscreen to capture it, the resulting image was corrected and looked fine. Does anyone know if this problem can be worked around? I'd sure appreciate any insight. BTW, I'm using the 66.93 drivers.thanks,