Pivot Point is not imported

Hey Developers, first of all sorry for my bad English. But now to my problem: I usually create my models in Blender and export them as FBX for use in Unity. But Unity recalculates the pivot points instead of importing them. But I need to set the pivots manually to rotate around it. I already tried in .blend format instead of FBX but I got the same result. So what could I have done wrong? At the moment I use Empties as parents to set the pivot but as you can imagine, it's not the best solution... thanks, Guderian (nonazi)