4 Direction Movement Problem

Hello all, Im trying to write a script that will allow my gameObject to move in 4 directions, however this is proving difficult. Now the gameObject still rotates to match the preferred direction (w,a,s,d), yet it only moves in the +z direction.

Any help is appreciated, thank you.

 #pragma strict
 
 public var walkSpeed : float = 1;
 
 function Start ()
 {
 
 }
 
 function Update ()
 {
 if (Input.GetKey(KeyCode.W))
 {
     walkSpeed=1;
     transform.forward = new Vector3(0f, 0f, 1f);
     transform.Translate(0, 0, Time.deltaTime);
     animation.Play("Walk");
     print("W pressed");
 }
 if (Input.GetKey(KeyCode.S))
 {
     walkSpeed=-1;
     transform.forward = new Vector3(0f, 0f, -1f);
     transform.Translate(0, 0, -Time.deltaTime);
     animation.Play("Walk");
     print("S pressed");
 }
 if (Input.GetKey(KeyCode.A))
 {
     walkSpeed=1;
     transform.forward = new Vector3(-1f, 0f, 0f);
     transform.Translate(-1, 0, 0);
     animation.Play("Walk");
     print("A pressed");
 }
 if (Input.GetKey(KeyCode.D))
 {
     walkSpeed=1;
     transform.forward = new Vector3(1f, 0f, 0f);
     transform.Translate(1, 0, 0);
     animation.Play("Walk");
     print("D pressed");
 }
 if(Input.anyKey == false)
 {
     animation.Stop();
     walkSpeed=0;
 }
 }