Error CS0117 : 'Movement Manager' does not contain definition for 'transform'

I'm working on a script to make my player to be always be looking at the direction he is walking. The original script done by Burdock can be found here http://forum.arongranberg.com/t/direction-of-movement/508/2 I am just trying to get it to work with the most recent version of unity and using a standard character controller but I've ran into an issue

 using UnityEngine;
 using System.Collections;
 using Pathfinding;
 using System.Collections.Generic;
 
 public class MovementManager{
 
     public CharacterController controller;
 
     public Transform Player;
 
     protected List<Vector3> LastPositionList = new List<Vector3>();
     public Vector3 LastPosition;
 
     void Move (Transform player) {
         Player = Player;
         controller = Player.GetComponent<CharacterController> ();
         }
 
     public void TurnAB(float UnitTurnSpeed, Vector3 LastPosition){
         Vector3 LookAt = Player.position - LastPosition;
         // This gets the opposite LOCAL position of the *LastPosition*.... IE(If the player is now at 1,1,1 and the LastPosition was 0,0,0....  LookAt will be 1,1,1 in local space, and will be 2,2,2 in world space)
         Quaternion LookRotation = Quaternion.LookRotation(LookAt);
         // Pretty simple here...
         Quaternion rotation = Quaternion.Slerp(Player.rotation, LookRotation , Time.deltaTime * UnitTurnSpeed);
         // Pretty simple here too.....
         Player.rotation = Quaternion.Euler(0, rotation.eulerAngles.y, 0);
         // This just makes sure no *Tilting* happens when, walking up stairs and such
     }
     
 
 
     void LastPositionCheck(){
         if(LastPositionList.Count >= 5){
             LastPositionList.Add (this.transform.position); //does not contain definition for 'transform'
             LastPosition = LastPositionList[0];
             LastPositionList.RemoveAt(0);
         }
         else{
             LastPositionList.Add (this.transform.position); // does not contain definition for 'transform'
         }
     }
 
 }

If anyone would know why this error is happening and how to fix it would be appreciated.