Hi Erin,
The best place to begin troubleshooting this issue is in Measurement and Automation Explorer (MAX). The first thing you should do is reset the traditional NI-DAQ driver. If you open MAX and go to devices and interfaces>>Traditional NI-DAQ devices>>right click and select "reset traditional NI-DAQ driver."
Also from there you can select your card and run a test panels. If the test panels works, then you will be able to run the examples in LabVIEW.
If the test panels will not acquire any data or give you an error, then do the following: delete the card in MAX, turn off your computer, remove and replace the card in the computer, and re-install the card.
Regards,
Hal L.