You probably need to track down the manufacturer's web site, Dave, for the
proper drivers. Depending on the maker, you may need to do some digging.
You could start at
www.google.com, and do a search for the actual name on
the card itself. You might open the case and see what the configuration is,
too, because it may be part of the motherboard and updating the drivers/BIOS
for that might fix it.