First thing, if you somehow modify your model, and export it as .3ds, you need to make sure to remove it's compiled version in _Work\data\Meshes\_compiled, it should have the same name as it's 3ds equivalent, but with .mrm extension.
Also make sure, that every modifications of your model are made in EDIT MODE, because when exporting, blender will zero rotation and scale values that you apply in OBJECT MODE, i'm not sure what will happen with location though, but probably the same thing.