Need help with a Chat

Hello, i'm pretty desperate here because i'm stuck on it for a couple days..
I want to add a chat system to my game, every tutorial that i've seen or any old threads about it made a Chat byitself, and i just want a Chat for my game, so if i tried to add what they did it didn't work.. So i had to try to make something by myself...
That's the script:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.Networking;
4. using System.Collections.Generic;
5. using UnityEngine.UI;
6.  
7. public class Chat : NetworkBehaviour
8.  
9.  
10. {
11.  
12.     [SerializeField]
13.     private Text _chatText;
14.     [SerializeField]
15.     private InputField _sendTextInput;
16.     [SerializeField]
17.     private GameObject _playerCanvas;
18.     [SerializeField]
19.     private SyncListString chatLog = new SyncListString();
20.  
21.     void Start()
22.     {
23.         if (isLocalPlayer)
24.         {
25.             _playerCanvas.SetActive(true);
26.         }
27.         if (!isLocalPlayer)
28.         {
29.             _playerCanvas.SetActive(false);
30.         }
31.     }
32.  
33.     [Command]
34.  
35.     void CmdSendMessage()
36.     {
37.         ChatMessageMsg msg = new ChatMessageMsg();
38.         msg.Message = ("Player " + netId + ": " + _sendTextInput.text);
39.         _sendTextInput.text = string.Empty;
40.         Debug.Log(ClientScene.FindLocalObject(netId).name);
41.         RpcReceiveChat(msg.Message);
42.     }
43.  
44.     [ClientRpc]
45.     public void RpcReceiveChat(string msg)
46.     {
47.         chatLog.Add(msg);
48.         _chatText.text += chatLog[chatLog.Count - 1] + "\n";
49.     }
50.  
51. }

Basically i have a Player prefab, it has the chat UI in it (So i can use the UI components with the script).
ChatMessageMsg has 1 string that inheritances the MessageBase class, and there is a Button UI that onClick calls the CmdSendMessage().
So, when players spawn, each player can control his own character, etc..
When the host sends a message it sends: "Player 1:"blabla"
But when a client sends a message it sends: "Player 2:" without the message...
Also the messages that were sent didn't display on the chat for all the clients.. Just to the client who sent the message ><
I hope someone could help me with it..