Using Photon View To update Text over the network

I’m Making a multiplayer FPS game and I want to give each player a 3d text object that they can write in whenever they want. everything is working fine except that other players don’t see the 3d text updating. Ive added a photon view component to the text, but letting it observe the text mesh or mesh renderer doesn’t work and gives me these errors:

Observed type is not serializable: UnityEngine.MeshRenderer
Observed type is not serializable: UnityEngine.TextMesh

Is there some other component I need to view?

PlayerNetWorkMover Script :- (To update a Text (Player names) over a network)

using UnityEngine;
using System.Collections;
using UnityStandardAssets.CrossPlatformInput;
public class PlayerNetworkMover : Photon.MonoBehaviour {
      public string playerName;
      private Transform _transformCacheName;
      private Transform _playerTransformName;
      void Start () 
      {
                _transformCacheName = GetComponent<Transform>();
		    _playerTransformName = _transformCacheName.FindChild("NameText");

                if(photonView.isMine)
		       {
                       GetComponentInChildren<PlayerNameScript>().enabled = true;
                   }
		    else
                   {
			    StartCoroutine("UpdateData");
		       }
	 }

        IEnumerator UpdateData()
	    {
               while(true)
		    {
                    playerName = _playerTransformName.GetComponent<TextMesh>().text;
                    yield return null;
		   }
	     }



       void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
    	{
    		if(stream.isWriting){
                         stream.SendNext(_playerTransformName.GetComponent<TextMesh>().text);
                    }else{
                        _playerTransformName.GetComponent<TextMesh>().text = (string)stream.ReceiveNext();
                    } 
            }

}

PlayerNameScript :- (You should attack this script at you player head)

using UnityEngine;
using System.Collections;

public class PlayerNameScript : MonoBehaviour {


	string playerName;

	void Update () {
		//playerName = GameControl.control.c_id;
		GetComponent<TextMesh> ().text = playerName;

	}
	
}