Because, they were bought. They aren't made by me, and I didn't get them for free.

Sorry, the defaultframe isnt in fragmotion removeable.

Test in fragmotion deactivate position-bone:
doubleclick the first animation, in the Keyframe Editor deactivate the
TranslateKeyList of the first bone.

Is the animation ok, do this by all animations.

jane, I can't find TranslateKeyList in Keyframe Editor. Please, tell me where is it.

In Keyframe Editor select the button "Show Translation Keys" (little circle
and arrow to the right)

It didn't help Any other ideas? Really need your help...

Dose some buddy have any ideas how can I fix this problem?

Export to blender and repair there? Then import to med. Only an idea. Never tried.

I have an other solution, may be some one also faced this kind of problems, so thats why I post my idea.
Solution is as simple as the problem All you need is just to use black (or whatever) box model with normal origin (will be used for collusion).
And then you need to attach your model (with wrong origin) on it and make it passable. After that you need to make it follow 'black' box, here you can adjust its Z.
And don't forget to make 'black' box INVISIBLE.

Indeed a very stable and common solution, but it creates some new problems: For example, the implementation of hitzones will get much more difficult.

Then use this:
http://www.conitec.net/beta/ac_updatehull.htm