OK, so there is some problem according to .fbx files. When I came to this site somebody told me to use 2012 edition of apps (Maya/Max) because Skyrim is working the best with that version, or Skyrim engine, I can't remember.
The point is that we all use different version of apps and when we transferring those .fbx files between them they are not working correctly. All that are involved in using of .fbx files should use the same version of apps and to update .fbx plugin and service pack to the latest version for that app.
It would be the best if we all can work with 2012 edition of app with the latest .fbx plugin for them, and that is 2013.3 version, so we don't have any trouble.
And when someone is sending .fbx he should check it in Maya/Max to see if he have correctly exported the scene.
The latest .fbx plugins for Maya/Max 2012 edition (32 and 64 bit) can be found here:
Maya
64 bit => http://images.autodesk.com/adsk/files/fbx20133_maya2012_win_x64.exe
32 bit => http://images.autodesk.com/adsk/files/fbx20133_maya2012_win.exe
MAX
64 bit => http://images.autodesk.com/adsk/files/fbx20133_3dsmax2012_win_x64.exe
32 bit => http://images.autodesk.com/adsk/files/fbx20133_3dsmax2012_win.exe

Problem is not everyone uses
Problem is not everyone uses Maya/Max.
Anyway, Rav should be using Max 2012, but did you get those FBX files to work? Did anyone send you new ones?