How to fix this: OnObjSpawn netId: 1 has invalid asset Id UnityEngine.Networking.NetworkIdentity:UNetStaticUpdate() ?

Ok, i don't know exactly what i'm doing wrong, i'm trying to make a client-to-client connection established, you know, than where one is the host and the other the clients?, and the host is also a client too?, yeah that one.

In fact i have a connection done without any dynamicity with visual unity totaly working, an excercise i do before try to do it dynamically using pure-code aproach, which is the one who have the problem right now.

Anyway, i receive this error in the client, when trying to establish the connection:

OnObjSpawn netId: 1 has invalid asset Id UnityEngine.Networking.NetworkIdentity:UNetStaticUpdate()

and also

OnObjSpawn netId: 2 has invalid asset Id UnityEngine.Networking.NetworkIdentity:UNetStaticUpdate()

I receive this through the console when i'm trying to connect to the host, it's important to notice than, in the host, i can see the client "apparead" when the connection is established, BUT, i don't see none of the elements from the host in the client been shown, i mean, not the scenary, and certainly not the host character, the only thing than the client show are that console errors than i just place before.

Another thing i notice is than every time i go outside of host mode, of the NetworkManagerHUD, the GameObject created for the host is not deleted, so if i press host in the NetworkManagerHUD, and then i stop it, and then i re-press it, i ended up with the original prefab, plus 2 clones, one for each time i press "Host" in the NetworkManagerHUD.

I guess i need to register the prefab, i know than for do that i need to add to the code something like this:

     ClientScene.RegisterPrefab (this);

but to be honest i don't know where exactly i must insert this, i tried in the code inside the prefab of the player, and in the one who generates everything, i'm doing all with code pure aproach, here are the codes:

Controller Class (the one who build the entire world)

 using UnityEngine;
 using UnityEngine.Networking;
 using System.Collections;
 using System.Collections.Generic;
 using System;
 
 
 public class RocketController : NetworkBehaviour {
 
     GameObject someGameObject;
 
     private Dictionary<string, Sprite> DicCharacterSprite;
     private UnityEngine.Object emptyObj;
 
     // Use this for initialization
     void Awake () {
         //Network Manager
         someGameObject = new GameObject ("Character2");
 
         this.gameObject.AddComponent<NetworkManager> ();
         this.GetComponent<NetworkManager> ().playerSpawnMethod = PlayerSpawnMethod.RoundRobin;
         this.gameObject.AddComponent<NetworkManagerHUD> ();
 
         GameObject startingPoint = new GameObject ("startingPoint");
         startingPoint.transform.position = new Vector3 (7, 0, 0);
         startingPoint.transform.parent = this.transform;
         startingPoint.AddComponent<NetworkStartPosition> ();
 
         GameObject startingPoint2 = new GameObject ("startingPoint2");
         startingPoint2.transform.position = new Vector3 (-7, 0, 0);
         startingPoint2.transform.parent = this.transform;
         startingPoint2.AddComponent<NetworkStartPosition> ();
 
         CreateCharacter (someGameObject, new Vector3 (5f, 0f, 0f), "CharacterPlus", "Character2");
 
         //Destroy (GameObject.Find("Character2(Clone)"));
 
         this.GetComponent<NetworkManager> ().playerPrefab = Instantiate (someGameObject) as GameObject;
     }
 
     bool CreateCharacter(GameObject goConv, Vector3 vecAwake, string doango, string name){        
         try
         {
             DicCharacterSprite = LoadSprites ();
             System.Type type = System.Type.GetType (doango);
 
             //Rigidbody2D and Script
             goConv.AddComponent<Rigidbody2D> ().gravityScale = 0;
             goConv.AddComponent (type);
 
             //Spŕite Renderer
             goConv.AddComponent<SpriteRenderer>();
 
             Sprite newSprite;
             DicCharacterSprite.TryGetValue("índice", out newSprite);
             goConv.GetComponent<SpriteRenderer>().sprite  = newSprite;
 
             //Network Identity
             goConv.AddComponent <NetworkIdentity> ();
             goConv.GetComponent <NetworkIdentity>().localPlayerAuthority = true;
 
             //Network Transform
             goConv.AddComponent<NetworkTransform> ();
 
             return true;
         }
         catch(Exception ex) {
             Debug.Log (ex.ToString ());
             return false;
         }
     }
 
     Dictionary<string, Sprite> LoadSprites(){
         DicCharacterSprite = new Dictionary<string, Sprite> ();
         Sprite[] sprites = Resources.LoadAll<Sprite> ("Sprites");
 
         //Debug.Log ("LOADED RESOURCE: CharacterSprite");
         Debug.Log ("Speak Your Mind! (LOADED SPRITES)");
         foreach (Sprite sprs in sprites) {
             Debug.Log (sprs.name);
             DicCharacterSprite [sprs.name] = sprs;
         }
 
         return DicCharacterSprite;
     }
 
 }

PlayerSetup (it set some component relation of the character)

 using UnityEngine;
 using UnityEngine.Networking;
 
 public class PlayerSetup : NetworkBehaviour {
 
     [SerializeField]
     Behaviour[] componentsToDisable;
 
     void Start()
     {
         if (!isLocalPlayer) {
             for (int i = 0; i < componentsToDisable.Length; i++) {
                 componentsToDisable [i].enabled = false;
             }
         } else {
             GameObject.Find ("SceneCamera").GetComponent<Camera> ().enabled = false;
             GameObject.Find ("SceneCamera").GetComponent<AudioListener> ().enabled = false;
 
             GameObject.Find ("CameraPlayer").GetComponent<Camera> ().enabled = true;
             GameObject.Find ("CameraPlayer").GetComponent<AudioListener> ().enabled = true;
         }
 
     }
 
     void OnDisable()
     {
         //Maybie, if the player dies, well need to place something 
     }
 }

Any help, constructive comment, question or answer would be much apreciated.

Thanks in advance.