Attaching a model to a blank GameObject?

I want to attach a model to an empty GameObject. I have got a code like this:

 GameObject factory = new GameObject();
 MeshFilter meshFilter = factory.AddComponent<MeshFilter>();
 MeshRenderer render = factory.AddComponent<MeshRenderer>();
 Mesh mesh = Resources.Load("FactoryModel", typeof(Mesh)) as Mesh;
 if (mesh != null)
     meshFilter.mesh = mesh;
 factory.transform.position = new Vector3(X * 50, 0, Y * 50);

The mesh is loading(checked by printing in log), but game object still shows without any model. Do anybody know what is the problem in my code?