Manually attached AnimatorController won't play

Hi there,
i played around with animated Sprites according to this Tutorial: http://michaelcummings.net/mathoms/creating-2d-animated-sprites-using-unity-4.3#.UwnNf_l5OYI

Everything works fine, and the sprite is animated. But for a real game i would want to load Sprites dynamically at runtime and attach animations to them.

But that isn't working. Here is my code to create a GameObject, attaching a SpriteRenderer and Animator/AnimatorController to it.

Code (csharp):

1.        
2.  var prof = Resources.Load("professor_walk_cycle_no_hat", typeof(Sprite)) as Sprite;
3.  var profObject = new GameObject("Prof");
4. profObject.transform.position = new Vector3(0, 0, -1); ;
5. profObject.AddComponent<Animator>();
6. profObject.GetComponent<Animator>().runtimeAnimatorController = (RuntimeAnimatorController)RuntimeAnimatorController.Instantiate(Resources.Load("professorAnimatorController"));
7. profObject.AddComponent<SpriteRenderer>();
8. profObject.GetComponent<SpriteRenderer>().sprite = prof;

When i press play, the sprite is showing, but the animaton won't play.
In the hierarchy window i can see that my GameObject looks identical to that, which i created manually.

However the really strange thing is that, if i change a property in the Inspector (e.g. Apply Root Motion of the Animator Component), the animation starts to play correctly :/

I found a similar problem here http://forum.unity3d.com/threads/210822-GameObject-won-t-move-when-I-attach-an-Animation-Controller

Is that a bug in Unity, or is it basically not possible to load animated sprites at runtime?

I cannot believe that adding all, possibly needed Sprites manually (with attached Animators to them), should be the way to go...

 

Okay i found out the solution.
Here is it for anyone who ran into the same problems.

I have to add the SpriteRenderer Component BEFORE i add the Animator. I don't know why, but otherwise maybe the animation isn't bind to the sprite correctly? So here is the working code:

Code (csharp):

1.  
2.         var prof = Resources.Load("professor_walk_cycle_no_hat", typeof(Sprite)) as Sprite;
3.         var profObject = new GameObject("Prof");
4.         profObject.transform.position = new Vector3(0, 0, -1);
5.         profObject.AddComponent<playerController>();
6.         profObject.AddComponent<SpriteRenderer>();
7.         profObject.GetComponent<SpriteRenderer>().sprite = prof;
8.         profObject.AddComponent<Animator>();
9.         profObject.GetComponent<Animator>().runtimeAnimatorController = (RuntimeAnimatorController)RuntimeAnimatorController.Instantiate(Resources.Load("professorAnimatorController"));
10.