MouseWheel event listening problem using Jogl 2 and newt lib

Hello,

i tried to use the addXListener methods in com.sun.javafx.newt.opengl.GLWindow and com.sun.javafx.newt.Window but haven’t received any mousewheel event.
I tried the demo code found in jogl2 demos and the result is the same. No System.err.println() appears on the console. (demo app’s name: NEWTTest1)
How can I fix this?

Thanks in advance!

(I found this to receive mouse events: http://blog.jausoft.com/2009/06/29/jogl-newt-multiple-threads-windows/)