Hi Run,
You aren't getting help, because you haven't posted the XP operating system, you are using. XP SP3, is not an operating system, but a Service Pack for Windows XP Home Edition, Professional Edition and Media Edition, but to mention XP Professional X64 Edition.
If you click Start, then right-click My Computer and click Properties, it will tell you your operating system.
You don't mention, what drivers are installed.
You don't mention if the PCI Slots are enabled or disabled in Computer Bios.