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Your motherboard is actually made by DFI. There are no 'XP' drivers for it, but usually Windows2000 drivers will work just fine.
Check out the latest
drivers for the AK75-EC and attempt to install them.
You will get a message indicating that the driver is 'not digitally signed', so you just hit [continue installation], and it should let you install anyway. (All that means, is that it wasn't specifically made for XP, so it is warning you about it.)
If that doesn't work, tell us what kind of issues (if any) you see in your Device Manager (Control Panel -> System -> [Hardware] -> Device Manager)
- rp