Hello-
Try verifying the installation in the GPIB applet found in Control Panel. First, click "Board Type" and set GPIB0 and GPIB1 to PCI-GPIB. Then, click ok and click GPIB0 and click configure. Set GPIB0 to the first serial number and GPIB1 to the second serial number. Then, click ok to close the dialog. A reboot will probably be necessary.
Randy Solomonson
Application Engineer
National Instruments