Animation problems - need help

Hi, I have a problem with my animations. When I send then to Unreal the pelvis change the position and bug the animation.

One of this links is the animation in Unreal, the other is in Maya:

https://drive.google.com/open?id=0BzKnsAINH5GSUTR2dlNhUkJMV1k
https://drive.google.com/open?id=0BzKnsAINH5GSNVVGLV9ETEJ6ek0