(C#) Screen.lockCursor not working?

Hello Unity members. This is my first time using Screen.LockCursor so this maybe a noob question. Anyways the proble I am getting it that when the cursor gets unlocked from another script like my PauseMenu script it will not lock agian once I exit the PauseMenu. All the script looks fine to me but I cant seem to get it to work.Help would be nice. :D

Edit I forgot to say this at the beggining but the cursor is locked when you press play

CursorControl Script

 using UnityEngine;
 using System.Collections;
 
 public class CursorControl : MonoBehaviour 
 {
     //Get scripts Here
     private Inventory inventory;
     private PauseMenu paused;
 
     // Use this for initialization
     void Start () 
     {
         //Get Scripts here
         inventory = GameObject.FindGameObjectWithTag("Inventory").GetComponent<Inventory>();
         paused = GameObject.FindGameObjectWithTag("GUI Manager").GetComponent<PauseMenu>();
 
         Screen.lockCursor = true;
     }
     
     // Update is called once per frame
     void Update () 
     {
         //Unlock the Cursor
         if(inventory.inventoryIsShown == true || paused.lockCursor == true)
         {
             Screen.lockCursor = false;
         }
         
         //Unlock the Cursor
         if(inventory.inventoryIsShown == false && paused.lockCursor == false)
         {
             Screen.lockCursor = true;
         }
     }
 }

PauseMenu Script

 using UnityEngine;
 using System.Collections;
 
 [ExecuteInEditMode]//Be seen in edit mode
 
 public class PauseMenu : MonoBehaviour 
 {
     //Public
     public bool isPaused;
     public bool lockCursor;
     //Private
     private bool ShowPauseMenu;
     private bool ShowOptions;
     private bool ShowSettings;
     private bool ShowQuit;
     
     //Center Window
     public Rect WindowPosition = new Rect(20,20, 120, 50);
     public bool CenterWindow;
     private Rect CurrentRect =  new Rect(20,20, 120, 50);
     
     // Use this for initialization
     void Start () 
     {
         CenterWindow = true;
         isPaused = false;
         lockCursor = false;
 
         ShowPauseMenu = false;
         ShowOptions = false;
         ShowSettings = false;
         ShowQuit = false;
     }
     
     void Update()
     {
         if(Input.GetKeyDown(KeyCode.Escape))
         {
             ShowPauseMenu = !ShowPauseMenu;
             isPaused = !isPaused;
             lockCursor = !lockCursor;
         }
     }
     
     void OnGUI () 
     {
         if(CenterWindow)
         {
             CurrentRect.x = (Screen.width * 0.5f) - (CurrentRect.width * 0.5f);
             CurrentRect.y = (Screen.height * 0.5f) - (CurrentRect.height * 0.5f);
         }
         
         if(ShowPauseMenu)
         {
             CurrentRect = GUILayout.Window(0, CurrentRect, PauseMenuWindow, "Pause Menu",GUILayout.MinHeight(Screen.height * 0.25f),GUILayout.MinWidth(Screen.width * 0.25f));
         }
         
         if(ShowOptions)
         {
             CurrentRect = GUILayout.Window(1, CurrentRect, OptionsWindow, "Options",GUILayout.MinHeight(Screen.height * 0.25f),GUILayout.MinWidth(Screen.width * 0.25f));
         }
     }
     
     void PauseMenuWindow(int windowID)
     {
         
         GUILayout.BeginVertical();
         if(GUILayout.Button("Resume Game"))
         {
             Debug.Log ("Resume Game");
             ShowPauseMenu = false;
             isPaused = false;
         }
         GUILayout.Space(2);
         if(GUILayout.Button("Options"))
         {
             Debug.Log ("Options");
             ShowPauseMenu = false;
             ShowOptions = true;
         }
         GUILayout.Space(2);
         if(GUILayout.Button("Save and Quit"))
         {
             Debug.Log ("Save and Quit");
             ShowPauseMenu = false;
             ShowQuit = true;
         }
         GUILayout.EndVertical();
     }
     
     void OptionsWindow(int windowID)
     {
         GUILayout.BeginVertical();
         if(GUILayout.Button("Settings"))
         {
             Debug.Log ("Settings");
             ShowOptions = false;
             ShowSettings = true;
         }
         GUILayout.Space(2);
         if(GUILayout.Button("Back"))
         {
             Debug.Log ("Back");
             ShowOptions = false;
             ShowPauseMenu = true;
         }
         GUILayout.EndVertical();
     }
     
 }


  Thanks for your help :D