Hi,
What Ashik said was true. Unfortunately we do not currently support the analyzer card on Win2K. You can always check what hardware works with what software on this page: http://www.ni.com/support/gpib/versions.htm. If you want to drop back to Windows NT, you will be able to use the card. Make sure that your card is a PCI-GPIB+ card (the plus indicates that it has the analyzer hardware onboard).
We are currently working on the analyzer drivers for 2k and XP. There is not scheduled release date as of right now. I can tell you that I anticipate seeing them around the middle to end of next year, but that is entirely speculation.
Hope this helps out!
Best Regards,
Aaron K.
Application Engineer
National Instruments