As you can see on the
download page, 6.9.3 is not supported on Vista. None of the traditional DAQ drivers are supported under Vista. Vista required vendors to rewrite their drivers and since the traditional DAQ drivers are obsolete, NI made the decision not to spend the time porting them over to Vista. If you have a card supported with
DAQmx, then you can use that. Otherwise, you will have to change your OS or get a DAQ board that is supported with DAQmx.