Retarget Anim Asset

Hi !

I had download animation from Mixamo, but when i do the documentation for “Retarget Different Skeletons”, my character is embedded in the ground (https://puu.sh/A8quw/019d7591f0.png).
The animation work, but my character is not good.

Someone know why ?

Retarget Different Skeletons : https://docs.unrealengine.com/en-us/…erentSkeletons

ps : sorry for my english '^^