3ds Max and Mecanim, spoiled animation

Hello guys. I making an animation in 3ds Max Character Animation Toolkit. But when i import that animation into Unity, everytime i have the same problem…
Please, watch the video

[1]: - YouTube
As u can see, the left foot is not normal. How i can fix it?

So to paste an answer in here from Meat5000 - and to expand on it:

  • Make sure your rig is symmetrical and does not need ‘force t-pose’
  • Verify your exports
  • Check out the docs below for guidance
  • Use the Mecanim avatar to check your bones are all green