Raycast isn't working on small distances

Hello,

I try to make a raycast to identify the tag of an object, but when the player (CharacterController) walk to close to it, it dosn't recognise the object.

 var hit : RaycastHit;
 var Reach : float = 5.0;
 var RayHit : boolean;
 
 function Update () {
     var fwd = transform.TransformDirection (Vector3.forward);
     Debug.DrawRay(transform.position, fwd * Reach, Color.red);
 
     if (Physics.Raycast (transform.position, fwd, hit, Reach) && hit.transform.tag == "Fish") {
         RayHit = true;
     }
 
     else
     {
         RayHit = false;
     }
 }