Character Controller Won't SimpleMove()

My character controller won't use SimpleMove(), but if I replace SimpleMove() with move it works fine. My character will by grounded the entire time, so I'd like to stick with SimpleMove(), but when I try to the object refuses to move. Like i said, with Move() the character can move absolutely fine. I've look around and tried deleting all my colliders, and also ensured the character is actually getting a Vector3 of substantial size, but when it prints the exact same math it says it has a vector of the size it should. Does anyone have any other ideas?

 using UnityEngine;
 using System.Collections;
 
 public class CubitMovement : MonoBehaviour {
 
     public CharacterController controller;
     public float speed;
     public float rotSpeed;
     
     // Update is called once per frame
     void Update () {
         controller.SimpleMove (transform.forward * Input.GetAxisRaw ("Vertical") * speed);
         print (transform.forward * Input.GetAxisRaw ("Vertical") * speed);
         transform.Rotate (Vector3.up * Input.GetAxisRaw ("Horizontal") * rotSpeed);
     }
 }