For some reason I can'tget FF7 to works with Windows Xp profesional and a GeForce2 MX400 video card so plz help me what should I do???

check and make sure its compatible with Windows Xp profesional. i probably wrong but its my only geuss.

ff7 came out a while ago on PC, back when Win 98 came out. IT's possible that it is not compatible, at all, with XP. You may want to look into it. Otherwise, you'll be SOL.