ViewStack with multiple mx:Modules

Question

Hi
I am trying to upgrade a project from Flex 3.4 to Flex 4.5.
The project uses a number of technologies, such as Cairngorm, Parsley.
I've already done an upgrade on a different project so I am a bit aware of which versions need to go with what.
So the problem I'm facing is as follows:
I have an mx:ViewStack which contains a few cairngorm ViewLoaders.
This custom made ViewStack is created programatically on creationComplete of the parent container (let's call it Parent) and added as a child to a (Parent's child)
So the configuration is as follows:
- Parent
  -- HBox (parent of viewstack), with id="viewStackContainer"
      --ViewStack is added programatically as a child to the HBox ("viewStackContainer") on Parent's creationComplete
        -- Cairngorm Module A
        -- Cairngorm Module B
        --  Cairngorm Module C
        -- etc
In Flex 3,  this would work fine, and only the first child of the ViewStack would be loaded.
A click on the ToggleButtonBar for the Module B would *load module B at that point*, a click on the ToggleButtonBar for the Module C would *load module C at that point*
In Flex 4.5...what I'm observing is that all modules are created at once even if the user has not clicked on the ToggleButtonBar to go to that view/module.
I've set the creationPolicy of the ViewStack to "auto" but it hasn't helped.
Is this a known bug...or am I missing something? 
Thanks!

Answer 1

You might want to try 4.6.  There was a bug in early Flex 4 versions where a creationPolicy=”all” on a high-level navigator propagated its creationPolicy to all child navigators.  I don’t remember if that was fixed in 4.5 or 4.6.