scene transition and alerts

In my app, I do some stuff in one scene and then ask user to save all new collected data. There is a back button upon pressing which I create an alert that ask user if he/she wants to save. On clicking any option my application would go back to previous scene but when I come back to previous scene, on clicking anything, same alert pops up. I even tried to cancel it in exitScene but still no progress.
One thing more, this issue raises only in device not in simulator.

Thanks in advance [import]uid: 173824 topic_id: 35635 reply_id: 335635[/import]