Score Counter from Text fields.

Hello, need some help. My English is not good but I hope you understand me.

I have 3 text input fields: "taskai1", "taskai2", "taskai3" and 3 dynamic text fields: "suma1", "suma2", "suma3".

I want to do this thing.

Then I press F1 key the text writing marker stand on imput field "taskai1" and I want to write numbers with keyboard for example 150 and then I press enter I want to see on dynamic text field "suma1" 150 if i write again for example 100 I want to see the result of 250 and so on. But I have a problem.

Problem is then the movie plays to next scene or next frame the number from dynamic fields gone and I have to count again. I want that flash remember these numbers until I close the flash.

Maby someone can help?

That my simple code:

stop();

stage.displayState = StageDisplayState.FULL_SCREEN;

stage.addEventListener(KeyboardEvent.KEY_DOWN, EnterKeyDown);

function EnterKeyDown(event:KeyboardEvent):void{

if (event.keyCode == Keyboard.ENTER){

var komanda1:Number = Number(taskai1.text) + Number(suma1.text);

suma1.text = String(komanda1);

taskai1.text = '';

var komanda2:Number = Number(taskai2.text) + Number(suma2.text);

suma2.text = String(komanda2);

taskai2.text = '';

var komanda3:Number = Number(taskai3.text) + Number(suma3.text);

suma3.text = String(komanda3);

taskai3.text = '';

}

}

stage.addEventListener(KeyboardEvent.KEY_DOWN, F1KeyDown);

function F1KeyDown(event:KeyboardEvent):void{

if (event.keyCode == Keyboard.F1){

stage.focus = taskai1;

}

}

stage.addEventListener(KeyboardEvent.KEY_DOWN, F2KeyDown);

function F2KeyDown(event:KeyboardEvent):void{

if (event.keyCode == Keyboard.F2){

stage.focus = taskai2;

}

}

stage.addEventListener(KeyboardEvent.KEY_DOWN, F3KeyDown);

function F3KeyDown(event:KeyboardEvent):void{

if (event.keyCode == Keyboard.F3){

stage.focus = taskai3;

}

}