Blender Animation is floating in Game. (How to fix? Help)

So I made a animation where the person is laying on the ground, but in game he floats 5 metres above the ground. How to fix this? please help, I am kinda new to Blender. I searched google and youtube but no answer.

http://s2.postimg.org/xh8rrouhx/edited_anim.png

The Animation I edited in Blender

http://s2.postimg.org/a1qumcaqt/wronganim.png

Animation in Game

make sure the origin, is at the floor…