LevelEditor not work with my model

[Statyk]

I'm not sure if Blender works the same, but in maya, it's best to freeze and reset transformations, then delete the object's modifier history, THEN export. It basically resets the object into a solid shape for a cleaner export. With the modifier history still on the object, it could be causing issues. Not sure if Blender can do this, but try deleting the object's history, then export.