Unity 2d Collision Problem

My player glitches on other objects. example video;http://www.youtube.com/watch?v=tCmcIdgk8x4

Update İ use Triggers on diamonds all same colors are same rectangle Script pragma strict

 var speed = 3.0; //This Data type is float.
 var jumpSpeed = 50.0;
 var grounded = true;
 var customSkin : GUISkin;
 var textureToDisplay : Texture2D;
 private var score = 0;
 
 function Start () {
   
 }
 
 function Update () 
 {
 
    var z : Vector3 = transform.right * Time.deltaTime * speed;   
    transform.Translate( z);
    
   if (Input.GetButtonDown("Jump"))
   { 
   Jump();
   }
 
 }
 
 function Jump()
 
 {
    if (grounded == true)
    {
   rigidbody2D.AddForce(Vector3.up * jumpSpeed);
   grounded = false;
   }
 }
 function OnCollisionEnter2D(collision : Collision2D) 
 {
   grounded = true;
   
 }
 
 function OnTriggerEnter2D(coin : Collider2D) 
 
 {
  
        // Increment the global score variable declared in the by 1
             // ++ is short hand for currentScore = currentScore + 1;
  score++;
 
 Destroy(coin.gameObject);
            
  
 }
 
 function OnGUI () 
 {   
     GUI.skin = customSkin;
        GUI.Label (Rect (-15, -12, 454 , 129),textureToDisplay);
 
 
 
     
     GUI.Label (Rect (50, 20, 500, 200), score.ToString());    
     
 
 
 }