Did the drivers come on a CD? I am not seeing any driver support from the website.
Several other persons have had this issue, from what I am seeing. Its definetly a driver issue. This will only get worse. XP is not supported by... really anyone anymore. You may have to upgrade to Seven.
Don't be afraid of Seven, I have it installed on an old AMD Athlon X2 machine with an E-IDE bus. Works fine.