Hello-
There are two versions of this driver one for LabVIEW (NI's graphical language) and one for LabWindows-CVI (NI's text-based language). Be sure to download the proper type of driver.
In LabVIEW, the driver should be placed in LabVIEW\instr.lib.
In LabWindows-CVI, it's necessary to Load the driver from the Instrument>>Load... menu. The files should be placed in cvi\instr.
Randy Solomonson
Applications Engineer
National Instruments