Unity iPhone tells me this is not correct:

var KaeferPrototyp : GameObject;  // Set to a Prefab in the inspector

var realKaefer = Instantiate(KaeferPrototyp , Vector3(spawnX  , 0.1, spawnY) , transform.rotation);
    var KaeferController_Script : KaeferController = realKaefer.GetComponent(KaeferController);     // ERROR: GetComponent is not a member of UnityEngineObject
    KaeferController_Script.SetTyp(kaeferTyp);

However, this works fine on Unity 2.6 PC. I am no programmer and just a Unity beginner. Can you please explain to a dummy?

Thank you very much!