Many thanks for your very prompt and informative response to my message.
I read this on page one of the manual:
"Not all peripheral devices support Windows Server operating
systems. Buffalo supports use in Server environments when using
supported Buffalo products. If 4 GB of memory or more are
installed on 32-bit versions of Windows Server operating systems,
the card may not function properly."
And I figured that was the reason my WinXP(32) OS was not recognizing
the newly installed USB-3 card.
Subsequently, I removed one GB of RAM, and cleaned the PCIx slot gold
fingers with a camel's hair brush and compressed air, then rebooted,
and it functioned nominally.
After receiving your response, I reinstalled the 1GB DDR3
RAM module, bringing the total back to 4GB, and booted the system.
All seems fully functional now. I am able to access the drives
attached to the IFC-PCIE2U3, and writing 2.4GB takes about 30 seconds!
I guess the true cause of my issue was the dirt that may have
accumulated on the PCI express connector gold fingers over the three
years it was open to dust in the environment.
Please accept my sincere apology and gratitude for your assistance
with this matter.
Best regards,
Larry Dighera