1120 URLVariables

Hello All,  I want to connect to Flash to Mysql databse through php to create a login system in Flash. I have set up all the UI components on stage and finished my php file . In my code it appears i am having some URLVariable issues . I copied part of the code from a tutorial and it worked fine. However, when i try to compile it i receive these 4 errors:

Line 33:1120: Access of undefined propert statusTxt.

Line 22:1120: Access of undefined property email.

Line 23:1120 Access of undefined property password.

Line 24:1120 Access of undefined property location.

I initially thought the errors may of been caused because i didnt give my UI components the relevant instance names but when i attempted to change the instance names i get the very same errors.

I show you part of my code below. Its too long to show it in full. If anyone can identify the problem i appreciate it if you can help me. Thanks

import fl.data.DataProvider;

import fl.events.ComponentEvent;

import fl.controls.TextInput;

import fl.controls.ComboBox;

import fl.controls.Button;

//Requesting the php

var phpFileRequest:URLRequest = new URLRequest(domain name);

var phpFileRequest.method = URLRequestMethod.POST;

//Building the variable names

var phpVars:URLVariables = new URLVariables();

//Building the loader

var phpLoader:URLLoader = new URLLoader():

phpLoader.dataFormat =  URLLoaderDataFormat..VARIABLES;

THESE ARE THE ERRORS

phpVars.email = email.text;

phpVars.password = password.text;

phpVars.location = location.text;

phpLoader.load(phpFileRequest);

phpLoader.addEventListener(Event.COMPLETE, showResult);

function showResult(event:Event):void{

(error statusTxt)

statusTxt.text = "" + event.target.data.systemResult;

trace(event.target.data.systemResult);

}

btn_one.addEventListener(MouseEvent.CLICK, btnHandler);

function btnHandler(event:MouseEvent):void {

    trace("Success");

}