Input Manager

Hey guys I'm been trying to move a character using the input manager. I was able to have the character move forward, but he doesn't move backwards though. I have my S key as the negative button and I was sure it would turn my positive value into a negative value. Here is my code on how i'm moving my character

 using UnityEngine;
 using System.Collections;
 
 // Require these components when using this script
 [RequireComponent(typeof(Animator))]
 [RequireComponent(typeof(CapsuleCollider))]
 [RequireComponent(typeof(Rigidbody))]
 public class Wolf_AnimationInput : MonoBehaviour {
 
     public float animSpeed = 1.5f;                // a public setting for overall animator animation speed
     public float lookSmoother = 3f;             // a smoothing setting for camera motion
     public float moveSpeed = 0.5f;
     public float rotateSpeed = 180;
 
     private Animator anim;
     private AnimatorStateInfo currentBaseState;// a reference to the animator on the character
     private CapsuleCollider col;        // a reference to the capsule collider of the character
     private CharacterController controller;
     private Transform _mytransform;
 
     static int idleState = Animator.StringToHash("Base Layer.Idle");
     static int runState = Animator.StringToHash("Base Layer Run");
     static int attackState = Animator.StringToHash("Base Layer.Attacks");
 
     // Use this for initialization
     void Start () {
 
         _mytransform = transform;
         anim = GetComponent<Animator>();
         col = GetComponent<CapsuleCollider>();
     
     }
     
     // Update is called once per frame
     void Update () {
 
         float v = Input.GetAxis("Vertical");                // setup v variables as our vertical input axis
         anim.SetFloat("Speed", v);
         anim.speed = animSpeed;
         currentBaseState = anim.GetCurrentAnimatorStateInfo(0);
 
         if (currentBaseState.nameHash == idleState)
         {
             if (Input.GetButtonDown("Attack"))
             {
                 anim.SetBool("Atk", true);
             }
             else
             {
                 anim.SetBool("Atk", false);
             }
         }
 
         if(Input.GetButton("Vertical"))
         {  
             _mytransform.Translate(new Vector3(0.0f, 0.0f, 0.0f) * Time.deltaTime);  
         }
 
         if (Mathf.Abs(Input.GetAxis("Horizontal")) > 0)
         {
             _mytransform.Rotate(0, Input.GetAxis("Horizontal") * Time.deltaTime * rotateSpeed, 0);
         }
 
        
     }
 }