Hey Grssmith,
Check to make sure your device is present in the Measurement and Automation Explorer under NI-DAQmx Devices. Depending on which board you�re using it will most likely be listed under both NI-DAQmx Devices and Traditional NI-DAQ Devices. The Read Dig Chan example uses the NI-DAQmx driver so it references the device labeling under NI-DAQmx Devices. If you are using the Read Dig Chan LabVIEW example all of your available choices should populate in the pull-down menu of the I/O control.
Please post back if you�re still having problems.
Sarah Miracle
National Instruments