onPreSubmit doesn't seem to work for me...

I am trying to have some sort of control on the table data before sending to the server and so I decided to use onPreSubmit.
To check if I was doing right, I tried the following:

var editor;
$(document).ready(function() {
editor = new $.fn.dataTable.Editor( {
		"ajaxUrl": tUrl, // php
		"domTable": "…",
		"fields": [ …]        
    });//end editor
...
...
editor.on ( 'onPreSubmit', 
     function (e, data) {
	var d = data.nome;
	alert("hey, you are " + d +"!");
	return false; // just to be safe
	}
    ); 

});//end $.(document).ready

When clicking the submit button on editor's form, I expected to see an alert with the message "hey, you are -name on the form- !",
but the alert message instead says: "hey, you are undefined!"
'nome' is a field which is correctly loaded and displayed both in the table and in editor's form.

…I can't understand why the 'data.nome' property turns out to be undefined.

What am I doing wrong?