The problem is easaliy solved.. your NotifyChange is wrong. You changed another field in your model, which is not listed there.. Try this:

@NotifyChange({"utenti","selected", "lstUtenti"})

I know, your list is not a "real" member, but it has been changed anyway. So you have to notify the controller of the change and he will redraw the list.

The problem is easaliy solved.. your NotifyChange is wrong. You changed another field in your model, which is not listed there.. Try this:

@NotifyChange({"utenti","selected", "lstUtenti"})
"lstUtenti"})