Hello;
There was probably something wrong during the installation of the NI-DAQ driver.
The best way to go about that is to uninstall NI-DAQ cmpletely, remove the DAQ device from the machine, reboot the computer, reinstall the driver, and choose to install the support files for VC++, during the installation.
That should fix the problem.
Hope this helps.
Filipe A.
Applications Engineer
National Instruments