The rotational centre of the model is actually a pivot when you're using animated meshes. The problem here is it's probably animated everything at an offset.
For this to work, you will have to re-export it with the correct center. Since you have the B3D you have the source file right? :)
For this to work, you will have to re-export it with the correct center. Since you have the B3D you have the source file right? :)