Hi, i think i`m on the same boat
In first you should check all bindings in Object->Binding Tab.
If you are sure that everything is ok then try to use that:
var aaa = xfa.data.saveXML("pretty");
to check what have you got you should write also:
app.alert(aaa);
You should see pretty XML with all data and scripting property.
I hope that is what you want if not i`m curious of the right answer.