Problem with UFPS and photon

Hi guys, so i was working on a multiplayer fps with UFPS and photon network, everything seems to be good until I disable the Vp_FPController and FPSCamera components and enable them only for “my” player instance. So i wrote this :

     void SpawnPlayer()
         {
             GameObject PlayerGO = PhotonNetwork.Instantiate("PlayerPrefab", new Vector3(1000,0,1000), Quaternion.identity, 0);
             Vp_FPController controllerGO = PlayerGO.GetComponent<Vp_FPController>();
             controllerGO.enabled = true;
                 FPSCamera cameraGO = PlayerGO.GetComponent<FPSCamera>();
             cameraGO.enabled = true;
         }

I got those errors

Assets/Scripts/NetWorkManager.cs(47,17): error CS0246: The type or namespace name Vp_FPController' could not be found. Are you missing a using directive or an assembly reference? > Assets/Scripts/NetWorkManager.cs(49,17): error CS0246: The type or namespace name FPSCamera' could not be found. Are you missing a using directive or an assembly reference?

Any solution ? thanks.