Lightwave FBX Export to Unity; IK rotations not exported.

I have had luck exporting my Lightwave models,textures, and animations to Unity. When I further animated my project and exported the fbx to Unity again I noticed some big problems. It seems that Unity understands my IK setup but not the option to match goal orientation. For example Unity animates my character moving his hand but when the hand null rotates to turn the hand down,nothing happens. Please help.