Alert or Popup in Modules

Question

Hi,
i'm developing an applicatin who uses Modules. The modules load and unload well and after unload a module, i can see in the profiler, the garbage collection remove the instance. so far so good.
now, i'm using a popup or alert in my modul (for data modification).
I load and unload my module again, without starting the alert or popup and all works fine. but after clicking a button, which triggers an alert, and unload my module again, the module won't remove by garbage collection. my instances in profiler is 1. Doing the same procedure, i generate in profiler two instances but after unload the module, the instance fell down to 1.
So i assume, that flex hold a reference to the alert-window i the first case. the second use the reference from the first. accordingly, the second will be garbage collected.
i'm trying to register the PopupManager in my ApplicationDomain with the follwowing two lines: import mx.managers.PopUpManager;  and privat var popuop:PopupManager. But nothing changes.
What is the right way to use Alerts (or Popups) in modules without references.
Here is my code:
To open my popup with an mxml-component:
PopUpManager.addPopUp(inputMask,Application.application as DisplayObject, true);
and my handler for the close-event of my mxml-component:
PopUpManager.removePopUp( CDBInputMask(event.currentTarget));
inputMask = null;
Thanks in advanced.
Frank

Answer 1

Alex,
thank you again.
I'm trying to get the information as you said:
"moduleInfo's loaded property simply reflects whether it has released its reference.  Any other references will still pin it.  The profiler will show that."
can you give me a hint, how can i get this information.
After pinning my module on memory caused by click on dg, the simpleModule will be shown in the loitering objects and i can see (48) behind it. but it's hard for me to find the references created by frameword or creatd by me.
My flex-version is 3.2.0, imho the latest version.
i read your post and work through, so, before i unload my module by button in mainapplication, i set the focus per "focusManager.setFocus(loadBtn);" away from my module. Also, i placed a dg on my mainApp with a dataProvider. Both won't fix my problem. in my example, there is no styles defined at all.
i think, i haver to get the information from profiler, which reference pin my module inmemory, but i'm unable to locate it at this time.
The unloading works fine until i click on the dg or typing in some letters. Imho, there must be a procedure that will pin the module after getting some buttonDownEvents (or something else). But i'm not so deep in the framework to figure out the procedure for my self.....
Can you give me further information, please.
thank you for your helpful answers. unfortunately i found no solution for my problem.
Frank