I moved it in to the PCI slot nearest my graphics card, and it worked.

Joyous. It might be old, but it still sounds excellent.



Note that it now probably shares an IRQ with your graphics card. Most
motherboards have this hardwired. It will work, but you may
experience audio glitches.

IRQ sharing works to a degree. But when a device needs to stream
time-critical data, putting it on its own IRQ is a Very Good Idea.
It can often be arranged, even on Windows XP systems with ACPI and
APIC.

Why isn't the SB card now in the bin?