Input.GetAxis Animation Problem

I have been wrestling with this issue for a few days now and id really like some help to resolve it. I have a series of animations and for some reason one of them will not play. Here is my code and ill explain my problem after...

 using UnityEngine;
 using System.Collections;
 
 public class AnimationTest : MonoBehaviour {
 
     public float runSpeed;
     public float gravity;
     public int lookDirection = 1;                       // 1 is right, 0 is left
     
     Vector2 velocity          = Vector2.zero;
     
     tk2dAnimatedSprite anim;                            //2dToolkit Animated Sprite
         
     void Start () 
     {
         anim = GetComponent<tk2dAnimatedSprite>();    
     }
             
     void Update () 
     {
         
         CharacterController player = GetComponent < CharacterController > ();
         
         if (player.isGrounded) 
         {
             velocity = new Vector2 (Input.GetAxis ("Horizontal"),0);
             IdleAndRun();
             Crouch();
         }
             
         WhereAmILooking();                                 //controls lookDirection
         velocity.y -= gravity * Time.deltaTime;
         player.Move (velocity * Time.deltaTime);
         
     }
     
     void IdleAndRun ()
     {
         if (velocity.x == 0 && lookDirection == 1)                                    
         {
         if (!anim.IsPlaying("Idle"))anim.Play("Idle");
                 anim.animationCompleteDelegate = null;        
                 print ( "Idle Right" );                                
         }
         if (velocity.x == 0 && lookDirection == 0)                                    
         {
         if (!anim.IsPlaying("Idle Left"))anim.Play("Idle Left");
                 anim.animationCompleteDelegate = null;        
                 print ( "Idle Left" );                        
         }    
         if (velocity.x > 0  && lookDirection == 1)                                                            
         {
         if (!anim.IsPlaying("Run"))anim.Play("Run");
                 anim.animationCompleteDelegate = null;                                    
                 velocity *= runSpeed;    
                 print ( "Running Right" );
         }
         if (velocity.x < 0  && lookDirection == 0)                                                            
         {
         if (!anim.IsPlaying("Run Left"))anim.Play("Run Left");
                 anim.animationCompleteDelegate = null;                                
                 velocity *= runSpeed;
                 print ( "Running Left" );
         }
     }
     
     void Crouch () 
     {
         if (velocity.x == 0 && lookDirection == 1 && Input.GetAxis ( "Vertical") < 0)
         {
             if (!anim.IsPlaying ("Crouch"))anim.Play("Crouch");
             anim.animationCompleteDelegate = null;
             print ("Crouching");
         }
         if (velocity.x == 0 && lookDirection == 0 && Input.GetAxis ( "Vertical") < 0)
         {
             if (!anim.IsPlaying ("Crouch Left"))anim.Play("Crouch Left");
             anim.animationCompleteDelegate = null;
             print ("Crouching Left");
         }    
     }
     
     void WhereAmILooking ()
     {
         if (velocity.x > 0)                                                            
         {
             lookDirection = 1;                                                        
         }
         if (velocity.x < 0)                                                            
         {
             lookDirection = 0;                                                        
         }    
     }
 }

My problem is that the 'idle' and 'run' animations in both directions work just fine. The 'crouch' animation, however, halts at the first frame. If i replace either the 'idle' or 'run' animation with a 'crouch' animation, the 'crouch' animation will play. Now, if i replace the 'crouch' animation with a 'run' or 'idle', they will not play but halt on the first frame. My problem has to be my conditions for calling this animation. What i have found is that if the player is grounded, it will only play animation that are controlled by the right or left arrows. I have tried all combinations of Input.GetKey, Input.GetButton, and Input.GetAxis and none of these methods work. Where am i going wrong? Why will the animations only play with the right or left arrow?

I'm pretty new to unity so i feel like i must be missing something simple. Thank you to anyone who can help me out.