snake game tail problems

For the first tail piece its worked fine, but the other tail pieces are not working , they are not following the snake they are going down the floor.

I figured out one problem for this behavior, for the first piece instance in the inspector view the target is set to snakehead and for the second piece instance the target name in the inspector is set to

pieces,but not piece, it should be piece

function addPiece () {
var newPiece : GameObject = Instantiate(piece, transform.position+Vector3(9, 0.5, 9), Quaternion.identity);
newPiece.name = "Piece";
newPiece.GetComponent.<SmoothFollow>().target = lastPiece;
lastPiece = piece;  }

the target name is pieces........can any one help me out in this problem