ShowFormInDIalog not working

Following the advice of Nicola Gervasi am trying to create my first web client but I have a problem that I can not solve.

From a listView I have a button that open a formInDialog but on the browser not absolutely nothing happens. In the smart client is all right (I also used the Web Filter).

The code used in a global method is very simple:

application.showFormInDialog(forms.dettaglio, -1, -1, -1, -1, 'Scheda', false, false, 'rec', true);

Someone may help to discover the error?
Thanks

PS: I have also read many times Unsuccessfully the manual developer.

Sorry. Closed and launched the developer everything works properly.

:? :?