How to know dialog box is destroyed for emitting a signal to calling page to load Page2.qml automatically

I’ve a main.qml where 3 states are maintained while in stateA (start up state) a dialog box qml is displayed (Ref: http://qt-project.org/forums/viewthread/26455) on destroying the shown dialog box, i wish to send a signal to my main.qml to load Page2.qml automatically. i tried doing this, the signal is emited before destroying the dialog box and disturbing complete functionality.