Overlay object does not work properly

I am trying to put an Overlay over the openGL panel.

I have this in the init() method:

overlay = new Overlay(drawable);
graphics2d = overlay.createGraphics();

And I have this in the display() method:

overlay.drawAll();
graphics2d.setBackground(Color.yellow);
graphics2d.drawString("HELLO WORLD!", 10, 10);

Nothing but all the OpenGL stuff appears on the screen. “Hello world” is not beeing printed.

What am I doing wrong?

http://kenai.com/projects/jogl/pages/FAQ#Bugreports_&_Testing