Hello aaaaaa,
Thank you for contacting National Instruments.
It appears that you are able to communicate with your instrument using your GPIB-USB-B card, but you are not able to use the GPIB analyzer in MAX.
The reason you are unable to use the GPIB analyzer is because the GPIB-USB-B card is not an analyzer card. The following link will provide a list of our plug-in GPIB Analyzers:
http://sine.ni.com/apps/we/nioc.vp?cid=12461〈=US
Hope this helps!
Matthew C
Applications Engineer
National Instruments