3ds max rigging problem

I'm trying to import a simple character model that I made in 3ds max, but unity somehow messes up the model. Here's a screenshot to clarify this: https://gyazo.com/97af393ffcc0f8bcefa89e647f49bcbe I rigged the model to a simple biped in 3ds max, using the physique modifier. The head is totally at the wrong position and the bone structure at the neck doesn't look right either. Any ideas?