scaling, heading direction

[Nastaran Taefi Aghdam]

Hi Everyone,

I am using Xsens data for Inverse Kinematics of a full body model. I had a question, I would appreciate if you can assist me:

When I apply the required rotations, and defining the heading direction, the model walking direction will not match the heading direction that I defined.
For example, I choose Pelvis as base body and +X as heading direction, but when run inverse kinematics, the model start to move on +Z direction.

I did not realize where the problem could be.

Best Regards,
Nastaran