Installing XP on Sata 2 HD

I just got a new Hitachi Sata2, so i install XP on it, it's XP with SP2 intergrated. When it got to the screen where you choose wich partition to install, when i choose the sata 2 HD it keep saying it's not a XP-compatible partition. Any idea how i can fix this ?

Mainboard is the Epox 9NPA+ Sli

daft question maybe but did you format it?

if there's unallocated space showing, create a new partition on it, else try delete the existing partition (assuming there already is one as you said it claims its not a compatible partion)