Hey Phil,
I was just curious if you were able to see the GPIB Instrument in Measurement and Automation Explorer(MAX)? Under Devices and Interfaces, can you open up the "Communicate with Instrument" window in MAX?
If this doesn't work, can you make sure under the software folder in MAX that both the NI-488.2 driver, and the NI-VISA driver are present? (Also can you report the driver version of those?)
Regards,
Nick D.