I can't make my ball jump using distToGround and Physics.Raycast

I'm new and I don't understand this. Here is the script that I'm trying to make the ball jump on :

 #pragma strict

 var rotationSpeed = 100;
 var jumpHeight = 8;
 var speed : float = 0.2;
 var TurnSpeed : float = 2.0;
 public static var distToGround = GetComponent.<Collider>().bounds.extents.y;
 var distanceToGround = distToGround;
 
 var Hit01 : AudioClip;
 var Hit02 : AudioClip;
 var Hit03 : AudioClip;

  private var isFalling = false; 


 function IsGrounded () : boolean {
 return Physics.Raycast(transform.position, -Vector3.up, distToGround + 0.1);
   
 }

 function Update () {
 
 //Handle ball rotation
 var rotation : float = Input.GetAxis ("Vertical") * rotationSpeed;
 rotation *= Time.deltaTime;
 GetComponent.<Rigidbody>().AddTorque (Vector3.back * rotation * 50);

 var rotation2 : float = Input.GetAxis ("Horizontal") * rotationSpeed;
 rotation2 *= Time.deltaTime;
 GetComponent.<Rigidbody>().AddTorque (Vector3.left * rotation2 * 50);

 //jump
 if (Input.GetKeyDown(KeyCode.Space) && IsGrounded() )    {
     GetComponent.<Rigidbody>().velocity.y = jumpHeight;

 }
 isFalling = true;
 }

 function OnCollisionStay ()  {
 
 isFalling = false;

 }

 function OnCollisionEnter () {

 
 var theHit = Random.Range(0, 3);
 if (theHit == 0){
     var audio: AudioSource = GetComponent.<AudioSource>();
     audio.clip = Hit01;

 }
 else if ( theHit == 1){
     var audio2: AudioSource = GetComponent.<AudioSource>();
     audio.clip = Hit02;


 }
 else {
     var audio3: AudioSource = GetComponent.<AudioSource>();
     audio.clip = Hit03;

 }
 audio.pitch = Random.Range(0.9, 1.1);
 audio.Play();

 }

The error I get is

InvalidProgramException: Invalid IL code in BallControl:.cctor (): IL_0000: ldarg.0 Rethrow as TypeInitializationException: An exception was thrown by the type initializer for BallControl

And whenever I start the game I can't move or jump. If i change the y of the Ball and let it fall i can't hear anything either.What should I do?