I added a button to a view and subscribed but its handler is never invoked?

[tothewine]

in the setup function of a view I added a button with this event handler:

onClick: function (dialog) {
    this.trigger('myCustomEvent');    
    dialog.close();
}.bind(this);

When I instantiate the view I do this in the 'callback' parameter of createView:

[FONT=courier new]this.listenToOnce(view, 'myCustomEvent', function () {
  alert("event activated!");
  // execute additional code...
  view.close();
}.bind(this));[/FONT]

But the alert is never executed. Do I need to define the string I use in this.trigger somewhere ?