I need help for input-dynamic text

I'm currently developing a game and I have a problem with my  input-dynamic text. I'm trying to make my input text appear on other frame whenever I click the button, well, I tried some solutions that I saw here but it really did not well.
This is the first code I used:

stop();

function handleClick(pEvent:MouseEvent):void {

          var myfirstVariable = box1.text;

          welcome.text = "Welcome to the game " + myfirstVariable;

          }

          enter_button.addEventListener(MouseEvent.MOUSE_UP, handleClick);

it does work but only on one frame. and this is the code that i am trying to use now:

stop();

var enteredText:String;

   welcome.addEventListener(Event.CHANGE, updateString);

   function updateString(evt:Event){

       enteredText = welcome.text;

   }

   enter_button.addEventListener(MouseEvent.MOUSE_UP, handleClick);

and on the other frame:

stop();

enteredText = welcome_2.text;

thank you very much for the help ^^