NVIDIA Graphics Card error

Has anyone seen the error "The NVIDIA OpenGL driver lost connection with the display driver due to exceeding the Windows Time-Out limit and is unable to continue." in DS before? I didn't have any problems at first, but now whenever I open a DSV file and then start panning, my graphics driver crashes, DS closes, and I get that message in a dialog box. Any suggestions? I have an NVIDIA GTX 560 graphics card.