Windows XP is not supported on that model - you should have checked Asus' driver page before installing XP.
It was designed for Windows 7 and that's what you should be running on it..
FYI, WINDOWS XP WILL WORK BUT THERE ARE SOME ISSUES I HAVE EVERYTHING EXCEPT THE WIRELESS DRIVERS WORKING SO FAR TRY DOWNLOADING THE GRAPHICS DRIVERS FROM AMD AND JUST SELECT THE OS NOT THE MODEL NUMBER AND IT SHOULD WORK