I built my own PC and FMS won't run on it for some reason. It's a P4 2.53 512k 533 FSB, Gigabyte board with Intel 845PE chip, Radeon 9700 PRO graphics, 512mb Corsair Xtreme DDR PC 2700 ram. It will run every game I've ever tried with all the bells and whistles on, but it won't run FMS. It also uses XP home, any ideas why it won't run it????