How change application´s state from a component´s function

Hi, I´m doing an Flex application,
I have created a component "usersRegister", that have next
function:
private function comprobacionBBDD():void{
if(numero>0){
mensaje="Perfect.\n\n\n Wellcome.";
HERE I WANT CHANGE THE STATE
}else if(numero==-1){
mensaje=mensaje+"error1";
}else if(numero==-2){
mensaje=mensaje+"Error2 \n\n";
Alert.show(mensaje);
The problem is that when in my application I instances the
component, I would like to change my application´s state when
the first "if" from the function is true.
Can you help me??
thanks in advance, and excuse my bad english.

Really thanks. I have try it and works perfectly.

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Hi dasun1981,
private function IsUserLoggedIn(evt:ResultEvent):void
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If I am right the above function is in your userlogin component and the two components "userlogincomponent" and "maincomponent" are in main application file and the states were also defined in main application file.
But in the function above the currentState refers to the state of the userlogin component and not the main application ...but the states are defined in main application file...that's the reason why the exception was thrown...
Instead you replace the line in the above function with the below line:
Application.application.currentState = "MainMenu";
Please mark it as answer if it helped you.
Thanks,
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