[Moo] Growl on Request Possible?

[Dailce]

We'lI found this cool script that I want to use:
http://icebeat.bitacoras.com/mootools/growl/

What I am trying to do is have the funciont gorl the message once the
Request is made.  However, I get an error "this.block is undefined
with firebug".

I added the Growl class to the page and tried to figure this out, but
no luck.  Help is greatly appreciated.


onRequest: function(){
         Growl.Smoke = new Gr0wl.Smoke('smoke.png');
         Growl.Smoke({
                title: 'Window.Growl By Daniel Mota',
                text: 'http://icebeat.bitacoras.com',
                image: 'growl.jpg',
                duration: 2
        })
}