activeWindow control problem

I now have a QWidget, clicking a button in this widget would call another window(A Q3MainWindow).

I have set the show() and setActiveWindow() to the new window, however I found that the new window don't have the control, it just appears as showing the ui, there's no response with any event of the new window(like clicking buttons).
Meanwhile I found that the original window still gain the control(which I don't expect it to do so)

Can anyone tell me what's going on? Or what should I do?

Code:

---

NewWin *newWin = new NewWin();
		newWin->show();
		newWin->setActiveWindow();

---

(NewWin inherits Q3MainWindow)


Thanks

can you show code wher you set up ui for both widget and how you create them?
it would be nice if this code will be compilable. :)

For the NewWin class:

Code:

---

NewWin::NewWin(QWidget *parent)  :  Q3MainWindow(parent)
{
    setupUi(this);
    init();
}

---

it's not enough.