need help to set speed and time in animation2D

Hello Everybody

i have a null refrence exception when i try to set the speed prgrammatically of a 2d animation

the animator and animation component are set to the tutrle object:



the code looks like this in c#

Code (csharp):

1.  
2. public class TurtleScript : BaseSceneElement {
3.     Animation ani;
4.     // Use this for initialization
5.     void Awake () {
6.         ani=transform.root.GetComponent<Animation>();
7.         ani["turtanim"].speed=1f; //Null Reference Exception
8.     }
9.    
10.     // Update is called once per frame
11.     void Update () {
12.         Scroll ();
13.         Debug.Log ("sprite turtle:"+ani["turtanim"].time);
14.     }
15. }
16.  

cant figure why i have this null pointer. Could somebody be kind enough to help me?

also, i cannot edit an existing animation, everytime i want to drag an animation in the animation window i cant
all buttons from the animation window want me to create a new animation not edit an existing one


many thanks

Ashkanis