Actionscript 3 :: Dynamically Change Button Labels In Flash?

I can run the code below, where the answers are dynamic text boxes hovering over the buttons. However, the user can't click the button where the textbox overlaps it. I need a way to either assign button labels like the 4 text boxes below or make it so the textboxes do not interfere with clicking the button?

var myXML:XML = new XML();
var XML_URL:String = "http://localhost/connect.php";
var myXMLURL:URLRequest = new URLRequest(XML_URL);

[Code]....

Update: I found the following to change the label, however I am confused as how I do this to buttons I have already created, perhaps using the instance name?

var myButton:Button = new Button();
myButton.label = "Click me";