[Blindmath] brailliant braille display and windows xp

[John Miller]

Hello,
This is John Miller. I recently purchased a Brailliant 40 cell display from Humanware.  My engineering work environment is predominantly Windows XP.
Humanware tech support and freedom scientific tech support have not been able to offer a solution for the Brailliant display not working with Windows XP laptop.
I wonder if the problem is my laptop in particular or the Windows XP operating system.
Does anyone have a successful experience using the Brailliant display with Windows XP and any screen reader? 
Can anyone give a successful experience about using the display with Windows XP and JAWS screen reader.
I am having good success with the Braille display and a laptop running Windows 7. The USB driver installs correctly on my Windows XP box but JAWS will not talk with the display.
Thank you for your help.
Best regards,
John Miller