Transmittance crashes my machine

the Transmittance shader crashes my Lenovo T61 Quadro nvs 140m, XP32, i get a blue screen of death referring to a nv4_display.dll (or something similar)

bluescreen sounds like a driver problem. can you udpate it?

Ironically I had to downgrade the driver, I had the latest Nvidia but now I ve installed the official Lenovo/IBM driver and Transmittance works ok, slow tough…