The new driver(2.3) came out two weeks ago. Give this driver a try. If you still have questions, please start a new topic since the original question was started a long time ago. Thanks.
Win 98/Me is no longer supported by the new GPIB driver version 2.3. You will have to stick with your version 2.2 unless you want to upgrade your system. If you have a new question please start a new posting so more people can view and respond to it. Thanks.
Try attaching the usb device directly to the computer, w/o going through the usb hub. The hubs sometimes give trouble for a variety of reasons. Sometimes their power supply is not strong enough to power all the devices hanging off of it.