I have done several Mixamo imports into Poser Pro 11. If you import with a Mixamo animation, the figure will animate easily inside PP11. If you just download the FBX without any animation, you have to pose the figure manually. I found that you need to click on the body part inside the Hierarchy pop-up window, and not on the body part in your scene window, then the body part will move correctly. Use the Parameter dials to move the body parts. If you get a set of FBX all coming into your scene, the topmost one in the Hierarchy window is the one that controls all the other FBX below it. That means, in the Hierarchy window, if you see Hair FBX as topmost, it will be fully rigged with all the body parts just like the Figure, the Clothing, the Shoes, etc. It is the Hair parts ( in my example) which will move all the other FBX figure parts.