Bouncing Ball Game

Hi I´m a noob in Unity and I´m trying to figure out the bounce of object such as a ball, I´m crating a small game with springboards with different bounce force. Such as Springboard1 has the bounce of 4, springboard2 has the bounce of 8 and springboard3 has the bounce of 12. The springboard has to push the player with these different kinds of forces. I´ve tried everything and the ball does gain extra force but just bounces upwards. Anyone can help I´ve tried this code but no avail.

var snapjump : int = 8;
var microjump : int = 2;
var superjump : int = 13;


function OnCollisionEnter (other : Collision) {
    if(other.gameObject.tag == "snapjump") {
   	   	rigidbody.velocity = Vector3.up * snapjump;
        
    }
    if(other.gameObject.tag == "microjump") {
   	   	rigidbody.velocity = Vector3.up * microjump;
    }
    if(other.gameObject.tag == "superjump") {
   	   	rigidbody.velocity = Vector3.up * superjump;
    }

}

As you can see in the screenshot the springboards are purple but with different kind of tags.
alt text

The tags are correct and the ball gets bounced correctly now with these codes

var snapjump : int = 10;
var microjump : int = 4;
var superjump : int = 15;


function OnCollisionEnter (other : Collision) {
    if(other.gameObject.tag == "microjump") {
   	   	 print("other.gameObject.tag = " + other.gameObject.tag);
   	   	 rigidbody.velocity = transform.up * rigidbody.velocity.magnitude * 1.0;
    }
    if(other.gameObject.tag == "snapjump") {
    	print("other.gameObject.tag = " + other.gameObject.tag);
 	  	rigidbody.velocity = transform.up * rigidbody.velocity.magnitude * 1.2;
    }
    if(other.gameObject.tag == "superjump") {
    	print("other.gameObject.tag = " + other.gameObject.tag);
   	   	rigidbody.velocity = transform.up * rigidbody.velocity.magnitude * 1.4;
    }

}

But when the ball goes to fast it goest through the objects as you can see in the video
Youtube Video

Anyhow to fix this object moving through another object ?

Here is the fixed code and it works as you can see in the video YouTube Video

#pragma strict

var microforceAmount : int = 1;
var snapforceAmount : int = 5;
var superforceAmount : int = 8;

function OnCollisionEnter(playerCol : Collision)
{
	if(playerCol.gameObject.tag == "microjump"){
		rigidbody.AddForce(rigidbody.velocity.normalized * microforceAmount, ForceMode.Impulse);
	}
	if(playerCol.gameObject.tag == "snapjump"){
		rigidbody.AddForce(rigidbody.velocity.normalized * snapforceAmount, ForceMode.Impulse);
	}
	if(playerCol.gameObject.tag == "superjump"){
		rigidbody.AddForce(rigidbody.velocity.normalized * superforceAmount, ForceMode.Impulse);
	}
	
}

function Update () {

}