If you're FBX file contains more than 1 bone per vertex influence, you will need A7 7.04 Pro. All other versions only support 1 bone per vertex.
Quote:
MED FBX import now also supports bones animation with an arbitrary number of bones per vertex. The FBX format is not downwards compatible to itself, so two FBX importers were now implemented. The normal importer is for FBX files saved with the 2006 FBX version, the 2005 importer is for FBX files saved with the 2005 FBX version. Multiple bones animation can only be imported, but not edited in MED. The number of bones per vertex is visible under Model Properties. The engine can animate with up to 4 bones per vertex. The number of bones per vertex can be restricted by setting the max_bones variable.
