@adi.barda the 3.3 change updated Animation System. When you export models using 3.2 it generate AnimControl for model, but when you export using 3.3 it will generate AnimComposer control that is new Animation control class. When using 3.3 you should use AnimComposer, im not sure if AnimControl still work in 3.3, but anyway when you export to j3o / load other format then AnimComposer is created instead of AnimControl.
you can see JME Tests for 3.3 for animComposer i belive(Ali provided links for tests). There should also be some documentation.
AnimComposer allow you to blend between animations, you can set what bones animation is assigned too. The Blend is something new, i think there was no blending in AnimControl.
There is also some AnimMigrationclass that can be used on 3.2 exported models for using AnimComposer class purpose. But in your case it looks like you have 3.3 exported models so you already just have AnimComposer class there.
In Any way, like Ali said, you need use AnimComposer since your models seems to also be exported using 3.3 so this class was created and no AnimControl is in scene graph of model.