With Xsens + Motion Live, if everything is green and you're still getting Actor 0: Go into Xsens Network Streamer (the place where you change the Host IP and Port number), and change Position + Orientation (Quaternion) to Position + Orientation (Euler). Check Unroll (not sure if you need to check unroll or not).
https://www.youtube.com/watch?v=csD3D3QtTtQ(Go to 1:50)
And, if the knees are bent, add like 15 cm to your height configuration in the Xsens Configuration window.
And also, if your characters arms are too close to the body in iClone, calibrate using the T-Pose, not the pose Xsens recommends.