Flipping Error! Spritesheet and JS!

Well, I have a sprite sheet and it only contains all movement in the right only!

So, no left movements!!

I checked some answers and found that if I changed the scale to negative, it'll work also for the left!! It mirrors the sprite!

So, I checked it in the inspector, it works! Both for left and right direction!

But, when I implement the same technique in the script during play, it does nothing!!

The local Scale has no effect at all!!

The script is as follows!!

 var walkSpeed                     : float     = 1.5;                    //speed of standarad wlak!
 var runSpeed                     : float     = 2.0;                    //speed of run
 var fallSpeed                     : float     = 2.0;                    //speed of falling down
 var walkJump                     : float     = 6.2;                    //jump height from walk
 var runJump                        : float     = 9.0;                    //jump height from run
 var crouchJump                     : float     = 10.0;                    //jump height from crouch
 var gravity                     : float     = 20.0;                    //force applied on char
 var startPos                    : float     = 0.0;                    //location for start position
 
 var moveDirection                 : int         = 1;                    //direction player facing || 1 right, 0 left
 
 private var velocity             : Vector3    = Vector3.zero;            //speed of player and direction
 private var jumpEnable            : boolean      = false;                //toggle for jump standard                
 private var runJumpEnable        : boolean      = false;                //toggle for run jump    
 private var crouchJumpEnable    : boolean      = false;                //toggle for crouch jump    
 
 
 
 function Update()
 {
     var aniPlay = GetComponent("aniSprite");                        //set aniPlay to aniSprite
         
     var controller : CharacterController = GetComponent(CharacterController);    //set controller to CharacterController
     
     if(controller.isGrounded)
     {
         jumpEnable             = false;                            //reset jumps
         runJumpEnable         = false;                            //reset jumps
         crouchJumpEnable    = false;                            //reset jumps
     
         
         velocity = Vector3(Input.GetAxis("Horizontal"),0,0);
         
         
         if(Input.GetKeyDown("Horizontal")>0.1f)
         {
             transform.localScale = Vector3(Mathf.Abs(transform.localScale.x,transform.localScale.y,transform.localScale.z);
         }
         
         if(Input.GetKeyDown("Horizontal")<0.1f)
         {
             transform.localScale = Vector3(-transform.localScale.x,transform.localScale.y,transform.localScale.z);
         }
         
         
         
         if(velocity.x==0)                    //idle left
         {
         
             aniPlay.aniSprite(7,3,3,1,1,10);                    //animation call to spritesheet
         }
         
         if(velocity.x>0)
         {
             
             aniPlay.aniSprite(7,3,0,0,6,12);
             aniPlay.aniSprite(7,3,0,1,4,12);
         }
         
         
         if(velocity.x<0)
         {
             
             aniPlay.aniSprite(7,3,0,0,6,12);
             aniPlay.aniSprite(7,3,0,1,4,12);
         }
     }
         
     velocity.y -= gravity * Time.deltaTime;                        //set gravitiy
     
     controller.Move(velocity * Time.deltaTime);
 }

So, am I doing anything wrong??

Please do help!! I can't just let the player work only on the right direction at all!!

Everytime I click play!!

The quads Z scale = 0, and X scale goes negative!

I only need to change the X scale to negative when left arrow is pressed! X scale positive when right arrow is pressed!!

Also, z scale should remain 0.5f at all time!!

y scale also fixed!

But, every time I click play Z scale goes to 0!

Is it because of using quad!!

Could you please direct me on this!!