Blender and FBX export / import issue

I have been playing around with Blender and created a basic chest with a open/close lid animation. When I export it and import in to UE4 it only shows a single piece of the chest, here are the files. Can someone look them over and let me know what I am doing wrong?

Blender File -

FBX File -

ok you need to join all the parts together first then parent it to the armature
have a quick look at my blender tutorials, they where made for udk but the workflow still apply s

OK thanks I will check them out