Script dont work when i build game

Hello, i use a click to move script, when i press to play form unity everything works but when i build game then i press click but character dont moves :/ (mouse click work bcause i checked other actions and works, just character dont moves)

this is my script (still not completed) (Fixed)
WARNING: Add "Ground" tag in your world-terrain or edit script

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.        
5. public class C2Move : MonoBehaviour      
6. {
7.     // The Camera we use
8.     public Camera myCamera;
9.        
10.     // Target Point
11.     private Vector3 TPoint;
12.          
13.     public float Speed = 5.0f;
14.     private float MaxClickDist = 1000.0f;
15.    
16.     public float Distance
17.     {    
18.         get;    
19.         set;        
20.     }
21.    
22.     void Start ()
23.     {
24.         // Initial Points
25.         TPoint = transform.position;
26.     }
27.    
28.     void Update ()
29.     {
30.         HandleClick();
31.     }
32.      
33.     void HandleClick()
34.     {
35.         if (Input.GetMouseButtonDown(0))
36.         {
37.             // Get Clicked Position in 3D World
38.             Ray ray = myCamera.ScreenPointToRay(Input.mousePosition);
39.             RaycastHit hit;
40.                    
41.             if (Physics.Raycast(ray, out hit, MaxClickDist))
42.             {
43.                 // This will allow take target without any prob
44.                 if (hit.transform.tag != "Ground")
45.                     return;
46.                
47.                 TPoint = hit.point;
48.             }
49.         }
50.        
51.         // Move character          
52.         MoveCharacter();
53.        
54.     }
55.            
56.     void MoveCharacter()      
57.     {
58.         Distance = Vector3.Distance(TPoint, transform.position);    
59.         if (Distance > 0.2f)
60.         {
61.             LookAtPoint();
62.             transform.position = Vector3.MoveTowards(transform.position, TPoint, Time.deltaTime * Speed);
63.         }
64.            
65.     }    
66.            
67.     void LookAtPoint ()            
68.     {                
69.         Distance = Vector3.Distance(TPoint, transform.position);    
70.         if (Distance > 1.0f)      
71.         {                    
72.             Quaternion targetRotation = Quaternion.LookRotation(TPoint - transform.position);      
73.             transform.rotation = targetRotation;  
74.         }    
75.     }
76.      
77. }
78.  

 

Problem fixed, script updated.