the current FMS code is limited to loading Direct3D .x files that contain only a mesh and no frame structure. The .x-file format generally supports a hierarchy of frames containing other frames and meshes. MetasequoiaLE 2.1 flattens the object structure used for editing into on mesh and stores this in the .x file. Newer versions like MetasequoiaLE 2.3 may be improved to save the object structure as frames, but this can not be loaded with the FMS.
For future versions of the FMS it is planned to load frames from the .x files as well ... to have moveable parts ...
Though try to flatten the frame structured .x files with some tool or export using MetasequoiaLE 2.1
Hope this helps ...

