my car had all polys flip in game!!!

hi all!
i create this rambler for track scenary, cars looks OK in 3dsmax 7.0 but when i put into game i get all polys flip.
any idea how to solve this???
mirror the object in 3dsmax??
thanks in advance

sergio loro

 

Try reset xform.

 

This is a workaround I learned from some old tutorial:

1. Make a normal box object
2. Turn it into "editable poly"
3. In vertex editing rollout, click "attach" and attach your car model to this box object
4. Remove box and center pivot again to your car

That's it

 

thanks guys