My do my animations foot slide?

I've downloaded an FBX animation of someone walking from the "Walking" section here - http://docs.ipisoft.com/Sample_Video_and_Project_(single_depth_sensor)

I then imported a humanoid character and specified the Rig for both as Humanoid (auto-create).

The original animation has very solid foot placement, but whenever I apply it to any character in Unity the feet slide around as if it were walking on ice.

Here is a video showing the problem

Is there something about the way I am getting Unity to auto-rig my character that would cause this problem? I have also uploaded my sample project file:

https://drive.google.com/open?id=18Vt9W3HRuE0wFIV8hsV6fNIws898iqRM

Any help would be greatly appreciated!

 

Answer: Open the Animator window for your controller, click the animation in question, tick "Foot IK" in the animation

 

Holy crap I cannot believe how much time I wasted on this until I found this post. Thank you.

 

what does this do exactly? it appears to do nothing for me. I have a giraffe foot sliding, is it sometimes just that the animation is poor?

 

OMFG Ive not been able to solve this problem for so long until now! WTF Unity? Why not just put this on by default for humanoids?
Thanks!!!