Input.GetButton not working

I have the following code:

         if (Input.GetButton("Previous") && canMoveLeft && canMove) {
             StartCoroutine(MoveLeft());
         }
 
         if (Input.GetButton("Next") && canMoveRight && canMove) {
             StartCoroutine(MoveRight());
         }

With in the Input Manager: Screenshot

What did I do wrong? Neither A/D and the controller buttons work.

Edit: should've stated at the start, but using Input.GetKeyDown does work.