Flex module sometimes is blank.

Hi guys,
My application consistens two parts : client side and server side. Client side is created using flex . Client side includes several modules under different tabs.When first access the client by browser, the module will load data from server backend.
I met such problems that the module sometimes be blank. There's nothing in the tab.I moniter the http request and response when blank tab is met . There's data in http request content and the data is same with content of http response when tab is correct.
I have already be troubled with this for several days and could some one give some advice about what problem maybe? Flex sdk3.2 is used.
Thanks very much.
Ivan.

Thanks for the suggestion. I add flexspy button in the first tab. And I moniter the property value tree when empty tab is met. All is same with the value when no errors happen. But I notice one thing:
1. only one canvas in the tab navigator visible=true at one time. i.e. currently A is the initial page, and you changed canvas b's visible property to true using FlexSPY , the display object of canva B will be overlapped with canvas A's object. This is the regular scenario, For the empty tab case, nothing change when you do above action..
So I am thinking whether there exist such a scenario:
as you know, when switching between tabs, the current canvas' visible property will change from false to true. And does there exist sometimes, only the visible property value changed , the display object isn't changed to display?
The action happened during first lanuching is :
1. get a list of tabs
2. create canvas based on above list and add to tabnavigator
3. then initial from the first canvas to last.
My application will create most UI component at the launch time

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> Hi everyone,
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> further
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"Smart_flex" <[email protected]> wrote in
message
news:g7b8ol$d57$[email protected]..
> Hello..I am very new to flex. I have recently studied
little bit about
> modular
> pgming in flex..I am doing a simple project as explained
below..but for
> some
> reason I am not able to make it to work..I am gettig
below error..I really
> apreciate some help on this.
>
> ReferenceError: Error #1069: Property subViewStack not
found on
> IntranetHome
> and there is no default value.
>
> I have a 'IntranetHome' which has code similar to below:
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