How do I address the protection level to allow my C# script to communicate with my Java script?

I get the error "Assets/Scripts/CursorControl.cs(46,32): error CS0122: `MultiplayerScript.showDisconnectWindow' is inaccessible due to its protection level" for the following code, namely line 46 where I'm trying to lock the cursor and pull up a "disconnect from server" window. However I don't seem to have the permission? Is this a multiscript issue or am I missing something?:

 using UnityEngine;
 using System.Collections;
 
 /// <summary>
 /// This script is attached to the player and it controls
 /// whether the cursor is locked or unlocked.
 /// 
 /// This script accesses the Multiplayer script.
 /// </summary>
 
 
 public class CursorControl : MonoBehaviour {
     
     //Variables Start___________________________________
     
     private GameObject multiplayerManager;
     
     private MultiplayerScript multiScript;
     
     //Variables End_____________________________________
     
     // Use this for initialization
     void Start () 
     {
         if(networkView.isMine == true)
         {
             multiplayerManager = GameObject.Find("MultiplayerManager");    
             
             multiScript = multiplayerManager.GetComponent<MultiplayerScript>();
         }
         
         else
         {
             enabled = false;    
         }
     }
     
     // Update is called once per frame
     void Update () 
     {
         if(multiScript.showDisconnectWindow == false)
         {
             Screen.lockCursor = true;    
         }
         
         if(multiScript.showDisconnectWindow == true)
         {
             Screen.lockCursor = false;    
         }
     }
 }