Movieclip within Movieclip

Hi guys, Im facing a lot of trouble with debugging this piece of code. Basically Im creating a new movieclip named “container1” inside a movieclip named “pageClip”. Then I load an image into container1. Then I create another movieclip named “loadingAnmi”, but this time, it’s inside of the container1 movieclip. I then load a second image into loadingAnim. However, it’s not showing, I have no idea why. I tried many other things. Maybe you can spot a mistake?

container1 = pageClip.createEmptyMovieClip("container1", pageClip.getNextHighestDepth());
  container1._x = 50
  container1._y = 50
  container1.createEmptyMovieClip("loadingAnim", container1.getNextHighestDepth());
  container1.loadingAnim._x = 60
  container1.loadingAnim._y = 60