Mesh deformed and animations do not work properly

I am new to unity yes i know. But, i have exported an FBX (2010) from my 3Ds max with an animation. It works fine in max, but in Unity the animation wont work, (just really looks like crap). And in the view-port my messh look awful and deformed, my bones aren't in place. But the funny thing is that in my preview in Unity my mesh looks just as in max. Why?