Walk / Run script not working.

Hey, I am currently having trouble making my walk/ run script work. The problem I am having is when I use a Boolean that asked whether or not the character can run, it doesn't walk at all, even if the boolean is set to true.

What exactly am I doing wrong? Here is the code below.

 var Speed        : float = 0;//Don't touch this
 var MaxSpeed     : float = 1;//This is the maximum speed that the object will achieve
 var Acceleration : float = 10;//How fast will object reach a maximum speed
 var Acceleration2 : float = 20;
 var Acceleration3 : float = 30;
 var Deceleration : float = 10;//How fast will object reach a speed of 0
 var grounded :boolean = false; //Check if the player can jump
 var notgrounded :boolean = false; //Check if the player can jump
 var jumpspeed : float = 15; //Check how high the player can jump
 var animator : Animator;
 var walk : boolean = false; 
 var Canwalk : boolean = true;
 var count : float = 10;
 var count2 : float =3;
 var count3 : float = 1;
 var particle1 : GameObject;
 var particle2 : GameObject;
 //var Rigid : Rigidbody;
 
  
 function Update () {
 
 
     if ((Input.GetKey ("right")) && (Speed < MaxSpeed)||(Canwalk == true)) {
      
     Speed = Speed - Acceleration * Time.deltaTime;
     animator.SetFloat("Speed", 0.5);
     this.walk = true;
     {
         if (Input.GetKey(KeyCode.A)){
         animator.SetFloat("Speed", 1.2);
         Speed = Speed - Acceleration2 * Time.deltaTime; 
         count-=Time.deltaTime;
             if(count < 0){
             
             Speed = Speed - Acceleration3 * Time.deltaTime;
             animator.SetFloat("Speed", 2.2);
             count2-=Time.deltaTime;
             particle1.SetActive (true);
             particle2.SetActive (true);
                 if(count2 <0){
                 count=10;
                 count2=3;
                 particle1.SetActive (false);
                 particle2.SetActive (false);
     }
     }
     }
     }
     }
     
     
     
      if ((Input.GetKey ("left")) && (Speed < MaxSpeed)&&(Canwalk == true)){
           
             Speed = Speed + Acceleration * Time.deltaTime;
             animator.SetFloat("Speed", 0.5);
             this.walk = true;
                 {
                 if (Input.GetKey(KeyCode.A)){
                 animator.SetFloat("Speed", 1.2);
                 Speed = Speed + Acceleration2 * Time.deltaTime; 
                 count-=Time.deltaTime;
                     if(count < 0){
                    
                     Speed = Speed + Acceleration3 * Time.deltaTime;
                     animator.SetFloat("Speed", 2.2);
                     count2-=Time.deltaTime;
                     particle1.SetActive (true);
                     particle2.SetActive (true);
                         if(count2 <0){
                         count=10;
                         count2=3;
                         particle1.SetActive (false);
                         particle2.SetActive (false);
                         }
                         }
                         }
                         }
                         }
                         
    
    
    
 
 {
     if(Speed > Deceleration * Time.deltaTime)
         Speed = Speed - Deceleration * Time.deltaTime;
     else if(Speed < -Deceleration * Time.deltaTime)
         Speed = Speed + Deceleration * Time.deltaTime;
     else
         Speed = 0;
         animator.SetFloat("Speed", 0);
         this.walk = false;
 }
 
 if ((Input.GetKeyDown ("space"))&&(grounded == true ))
 {
 animator.SetBool ("Jump" , true);
 rigidbody.velocity.y = jumpspeed;
 grounded = false;
 notgrounded = true;
 
 }
 
 
 {
  
 transform.position.x = transform.position.x + Speed * Time.deltaTime;
 
 }
 }
 
 function  OnCollisionEnter (collision : Collision)
 {
 
 if (collision.gameObject.tag == "Platform")
 {
 animator.SetBool ("Jump" , false);
 grounded = true;
 notgrounded = false;
 
 }
 {
 if (collision.gameObject.tag == "Death"){
 //play animation
 Speed = 0;
 transform.position = Vector3(200.15732, 0.5440826, -0.9341621);
 //play animation
 
 }
 }
 
 }
 function OnCollisionStay (hit : Collision) { 
      if(hit.gameObject.tag == "Plateform"){
          transform.parent = hit.transform ; 
      }else{
          transform.parent = null;
  }
 }
 
 

Canwalk is the boolean causing this problem, if it taken out everything functions fine.