Problem in Instantiate Gameobject Through Network

Hello i have Small Problem With Instantiate Game-object using RPC

for Example i want To Instantiate a Cube

using This :

             networkView.RPC("SpawnCube",RPCMode.AllBuffered,MyTransform.position,Quaternion.Euler(MyTransform.eulerAngles.x + 90,
                                                                 MyTransform.eulerAngles.y, -45));
 
 
     [RPC]
     void SpawnCube(Vector3 fireFrom, Quaternion direction){
         
         Instantiate(Cube, fireFrom + new Vector3(0,1,0), direction);
         
     }

now i joined the game i Instantiated a Cube perfectly. all player can see the cube now but if someone Disconnect Then Connect Again [i mean Reconnect] he cant see the cube

i need to know how to make the new players joined the room can see the Instantiated Cubes