are you sure you exported the right FBX type?
and from what program are you exporting?

I always use FBX 2006.11 from Maya, never had any problems.
Again, make sure you're not exporting as FBX2009 or something, that will make it crash indeed.

regards,

Formerly known as dennis_fantasy
Portfolio - http://www.designorhea.com/
Project - http://randomchance.cherrygames.org/