send message by networking

Hi, again, i'm here because i have a problem, i'm trying to access to a networkplayer, how can i send message by networking i've tried this but i get an error, here's the code

 function OnTriggerStay(otro : Collider)
 {
                 if(otro.gameObject.tag == "Player")
                 {
                     if(otro.GetComponent(MovimientoJugadorBasico)){                        
                         if(modoAtaque){
                         if((Input.GetButtonUp("punch")  || Input.GetButtonUp("kick")))
                         
                         //otro.GetComponent(MovimientoJugadorBasico).recibirAtaque(modoAtaque,hit);
                         var viewID = otro.collider.networkView.viewID;
                         networkView.RPC("aplicar",RPCMode.All,viewID,otro.gameObject.name);                        
                         }
                         otro.GetComponent(MovimientoJugadorBasico).herido = modoAtaque;
                     }
                 }
 }
 

and the RPC function

 @RPC
 function aplicar(id : NetworkViewID, d : String)
 {
     var enID = NetworkView.Find(id);
     var en = enID.observed.gameObject;
     
     en.gameObject.SendMessageUpwards("recibirAtaque",hit,SendMessageOptions.DontRequireReceiver);
     
 
 }

if you know other way, please help me