Aim down sights help

im new at unity and i wanted to make a first person shooter where i can aim down sights this is the code but it doesnt work. it tells me input q is not set up when i do have both vectors set up

var HipPose : Vector3; var AimPose : Vector3; function Start () { transform.LocalPosition = HipPose;

} function Update () { if(Input.GetButtonDown("q")){ transform.localPosition = AimPose; }

}