Disable click action when collision

I have a 2D block falling (like tetris) and is rotating when click on this. I would to disabled this action (rotation when click) when the blocks do collision with the ground. I try this but I don´t know why but it isn´t work. The rotation work but it doesn´t stop
This is the script to stop the rotation:

var rotar = rotaralclick;

function OnTriggerEnter(Otro : Collider)
{
    if (Otro.gameObject.name == "suelo") 
    {
        GetComponent.rotar.enabled=false;
    }
}

and this is the script of the rotation, in the same prefab

function Update ()
{
    if(Input.GetMouseButtonDown(0))
        transform.Rotate(0, 0, -90);
}

for your Bottom script, add the variable: var hasLanded = false;

this is what it should look like in the top Script:

 function OnTriggerEnter(Otro : Collider)
 {
     if (Otro.gameObject.name == "suelo") 
     {
         GetComponent.rotar.enabled=false;
        this.GetComponent( bottom Script name Goes here ).hasLanded = true;
     }
 }

and the bottom Script should look like this:

var hasLanded = false;

 function Update ()
 {
if(hasLanded == false)
{
     if(Input.GetMouseButtonDown(0))
         transform.Rotate(0, 0, -90);
 }
}

if i am reading what you’re saying, and both scripts are indeed on the same object, this will work.

hope this helps.