Hi!
Follow the steps from your website to get the LabVIEW driver.
www.ni.com >> Support >> (In Option 3) Drivers and Updates >> Select the right setup for your LabVIEW version and operating system.
Or follow the link
http://digital.ni.com/softlib.nsf/MainPage?ReadForm&node=132010_US
Product Line: LabVIEW
Software: LabVIEW RunTIme Engine
Software Version: 6.1 in your case
Operating system: ???
Hope this is helpful.