Component shows in Design view but not when the application is launched - apache-flex

Question

This is what's happening:
I have a Tabnavigator with the following tab:
<s:NavigatorContent width="100%" height="100%" label="Add a logo" includeIn="loggedin">
<components:LogoSearch />
</s:NavigatorContent>
When I change the state to "loggedin" with following code:
protected function Login_getStateHandler(event:Event):void
{
this.currentState = "loggedin";
}
the navigatorContent shows but not the component "LogoSearch", in design view however it does show when I switch states.
There are no states defined in "LogoSearch" and should show...?
When I include the tabnavigator in "normal" aswell as "loggedin", then change the state to "loggedin", the component "LogoSearch" shows. When I only show the tabnavigator in "loggedin", change the state to "loggedin", the component "LogoSearch" doesn't show.
Any idea why this is happening? I'm no pro in flex at all so feel free to point me on my mistake. Thanks.
Tried working with invalidateDisplayList() and invalidateProperties() as suggested by Tianzhen Lin. Still nothing showing.
<s:NavigatorContent width="100%" height="100%" label="Add a logo" includeIn="loggedin" id="AddLogoTab" >
<s:Label text="test" id="test" />
</s:NavigatorContent>
And :
protected function Login_getStateRegisterHandler(event:Event):void
{
this.currentState = "register";
test.invalidateDisplayList();
test.invalidateProperties();
test.validateNow();
AddLogoTab.invalidateDisplayList();
AddLogoTab.invalidateProperties();
AddLogoTab.validateNow();
}
Whatever I do, the content of the NavigatorContent won't show after statechange.

Answer 1

To narrow down the problems you have, you may start by eliminating includeIn="loggedin" in your code, this would at least ensure that your component is showing properly.
Next, I would put a breakpoint at your Login_getStateHandler function, and see if it is ever called. If not, then it is somewhere in your wiring that the handler is not called. You may post more code here to get help.