Hello;
The best way to go about that is to uninstall the NI-DAQ completely and remove your board from your machine.
Then, reboot the machine and reinstall NI-DAQ only, reboot the machine again and put the board back in.
If you see the same problem, try the board on diffrent slots and ultimately, on a different machine.
Hope this helps.
Filipe A.
Applications Engineer
National Instruments