Howdy and welcome to AMHD !!
Download a program called Belarc from
www.belarc.com and run it..
It should tell you the make and model of your soundcard..
Once you have that info, go to the manufacturers website and get the proper driver..
Depending on the age of your system, there may not be an XP driver for it.. If that is the case, try using the Win2K driver if there is one available !!
Murray