PPLUO,
There are really three GPIB-USB devices from National Instruments (assuming that you are not using a third-party GPIB-USB device). The first device, the GPIB-USB, has been obsoleted for newer technology. This obsoleted device can only be run on Windows 98/Me and Windows 95 using version 1.7 of our NI-488.2 driver. The other two devices, the GPIB-USB-A and GPIB-USB-B, will both run on Windows 2000/XP and Windows 98/Me with version 2.2 or 2.3 (2000/XP) of our NI-488.2 driver. More information on the correct driver versions can be found here:
GPIB DriversNow with regards to the tulip.dll driver this is only needed when using HP/Agilent hardware (say an HP PCI-GPIB board). In most cases we want to stick with National Instruments' NI-VISA driver (so I would deselect this DLL when using NI hardware). Version 3.2 is the latest driver for Windows 2000/NT/XP and version 3.0.1 is the latest version for Windows 98/Me support (with version 2.6.1 giving us Windows 95 support). These NI-VISA drivers can be found here:
NI-VISA DriversHope that helps!
Craig H.
NI Applications Engineering