3DMark 06 has encountered an error

Hi experts,
I downloaded 3DMark 06 and went to run it, all is fine, I start benching, and then like half way through I get this error! Does anyone know what the problem might be? My specs are in my sig, and I am pretty sure my drivers are all up to date. My current drivers are:
Installed Drivers nv4_disp (6.14.10.8198 – nVIDIAForceWare 81.98)
Any idea would be appreciated. Thanks for all.

3DMark 06
IDirect3DDevice9: Present failed: Device lost (D3DERR_DEVICE LOST)
OK
