Unity 5.1 network spawn doesn't work

Hi i am using the latest unity version 5.1.1 f1 and i have been stuck for ages trying to solve a problem which seems to be simple to everyone

i can't spawn objects to the server no matter what, this is the code

 using UnityEngine;
 using System.Collections;
 using UnityEngine.Networking;
 public class InsTest : NetworkBehaviour {
 public GameObject testIns;
     // Use this for initialization
     void Start () {
  
     }
  
     // Update is called once per frame
     void Update () {
     if(Input.GetKeyDown(KeyCode.I))
     {
     CmdTestIns();
  
  
     }
     }
  
  
     [Command]
     void CmdTestIns()
     {
     GameObject tmp = Instantiate(testIns,Vector3.zero,Quaternion.identity) as GameObject;
     NetworkServer.Spawn(tmp);
     }
 }

 

its pretty simple and neat

i have all the components net manager and network identity and i have add the object to the spawn list

on this object that has this script there is only network identity i have debugged it outside the game and inside and they all run

first if i was the host the object gets instantiated but only one can see it which is the host

second if i was the client nothing gets instantiated on the host or the client

i have followed the steps very carefully of many tutorials on youtube and unity fourm/answers this bug just refuses to get solved