SubscriptionStoreView how to handle the Cancellation Button

Hi All, I use the SubscriptionStoreView and it displays a cancellation button in the upper right corner. How do I set a value of a local variable and dismiss the SubscriptionStoreView when the user clicks the cancellation button? Right now it seems as if the cancellation button is disabled and nothing happens when I press the cancellation button. Any help is appreciated. Regards Thomas S