setup mocap with humanik

#1

Hi, all. i found free mocap files on the internet. this files in the archive is attached. photos is below
my question is:

  1. the area in photo is giving error when i would setup with human ik. how can i do? (image1)

  2. what is thing in the middle? how can i destroyed it? (image 2)

  3. how can i see the joints belong chain of skeleten? (image 3)

https://www.sendspace.com/file/0weh1x

  1. image: https://i.hizliresim.com/lWgJnJ.png

  2. image: https://i.hizliresim.com/VMJo4Z.jpg

  3. image: https://i.hizliresim.com/y3OYyk.png
    thanks for everythink.