Imported mesh bone rotation problem

Hi, I imported a model from 3DS MAX to UE4 as Skeletal Mesh and it seems to work well but any time I try to rotate a bone (any bone ) the model flips like if he’s trying to do a handstand. I tried to change up-axis in FBX export settings, I tried to change rotation on import settings in UE4 and I visited tons of threads looking for a solution but now i’m stuck. I hope someone can help me with this.

Imported model:

115683-immagine2.png

This is what happens when I move a bone (excluding root which is the only bone that actually works well)

115684-immagine.png

Here you can take a look to the model:Google Drive: Sign-in

still waiting for an answer

fixed with that: https://answers.unrealengine.com/questions/110482/how-to-solve-warning-imported-bone-transform-is-di.html