Creating a clone of another game object at mouse click

Hi everyone, I am have some trouble, I have 2 game objects, 1 for lines and 1 for 3DBalls, in the Line script I want to create a clone of the 3DBall at the mouse location. I tried doing the following :

         if (Input.GetMouseButtonDown(0))
         {
             

             Vector2 NewCirclePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);

             GameObject NewCircle = Instantiate((GameObject)Resources.Load("3DBall"), NewCirclePos, Quaternion.identity) as GameObject;



         }

This however, hangs indefinitely, am I doing this Instantiation completely wrong?

Thanks everyone