ActionScript 3.0 Button Compile error - php

Question

I want to create a login database in Flash via MySQL PHP route. I copied a large portion of the code from some tutorials. My login basically contains users entering their email address picking a password and I have a basic Combobox.
When I run the code I receive this error...
ReferenceError: Error #1069: Property data not found fl.controls.Button and there is no default value.
at phpRegister_fla::MainTimeline/btnHandler()
I have debugged Flash but I don't get any additional information.
After searching online I still don't understand what is causing the error.
I hope my code will help you pinpoint where I am going wrong. Apologies its kind of long.
Any help much appreciated.
import flash.net.URLVariables;
import flash.net.URLRequest;
import flash.net.URLLoader;
import flash.events.MouseEvent;
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.text.TextField;
import fl.data.DataProvider;
import fl.controls.Button;
btn_Submit.addEventListener(MouseEvent.CLICK, btnHandler);
//Validate form fields
function btnHandler(event:MouseEvent):void {
status_Txt.text = "" + event.target.data.systemResult;
trace(event.target.data.systemResult);
var phpVars:URLVariables = new URLVariables();
var phpFileRequest:URLRequest = new URLRequest("phpFile");
phpFileRequest.method = URLRequestMethod.POST;
phpFileRequest.data = phpVars;
phpVars.email = email.text;
phpVars.ps_wd = ps_wd.text;
var phpLoader:URLLoader = new URLLoader();
phpLoader.dataFormat = URLLoaderDataFormat.VARIABLES;
}
textOneField.addEventListener(Event.CHANGE, changeHandler);
function changeHandler(event:Event):void {
trace("data entered");
}
textTwoField.addEventListener(Event.CHANGE, changeData);
function changeData(event:Event):void {
trace("data changed");
}
email.addEventListener(KeyboardEvent.KEY_UP, keyHandler);
ps_wd.addEventListener(KeyboardEvent.KEY_UP, keyEnter);
function keyHandler(event:KeyboardEvent):void {
if(event.keyCode == Keyboard.ENTER)
trace("keyboard was pressed");
}
function keyEnter(event:KeyboardEvent):void {
if (event.keyCode == Keyboard.ENTER)
trace("Enter button hit");
}
var persons:Array = new Array();
persons[0] = "Male";
persons[1] = "Female";
c_two.dataProvider = new DataProvider(persons);
c_two.addEventListener(Event.CHANGE, dataHandler);
function dataHandler(event:Event):void {
trace(event.target.value);
}

Answer 1

There probably isn't anything wrong with the code. It is rather that you are using a component that doesn't exist in the "standard flash library" namely fl.controls.button. In order for you to be able to use that you need to add a linkage to that component.
Since you didn't mention how you compile your code it is kinda hard to tell you what to do. However, you probably don't need the fl-button but could do with a "SimpleButton" or "Movieclip" or something else instead.
If Flash:
http://forums.adobe.com/message/4260710?tstart=0
Similar issue:
AS3 Error: '1172: Definition fl.controls:Button could not be found.'
More info:
http://www.actionscript-flash-guru.com/blog/14-flcontrols-not-found-how-do-i-import-the-fl-package

Answer 2

In your btnHandler function you have :
... event.target.data.systemResult ...
Where event.target seem to be an fl.control.Button object.
Those objects have no "data" property.
i don't know what you are looking for in event.target.data.systemResult ?