Hello;
The best way to go about that is to completely uninstall the NI-DAQ driver you have installed on that machine, turn the computer of and remove the board from it.
You then reintall NI-DAQ, and put the board back. If the same behavior shows, the best bet is to search for some other peace of Software/Hardware currently installed on the machine that might be conflictant with NI-DAQ.
Regards
Filipe A.
Applications Engineer
National Instruments