Hey dksys2000,
It looks like quite an old setup you have there so it will be slightly more difficult to find documentation. Did this error all of sudden start happening or is this a new setup?
From the research that I have done it looks like the LabVIEW 3.1.1 installer installs a set of DAQ driver files that are guaranteed to work with LabVIEW. So if you happen to install an older version of the NI-DAQ drivers, you may run into problems. Let's first try uninstalling everything and then reinstalling only LabVIEW to see if this fixes the problem.
Regards,
Chris Delvizis
National Instruments