TypeError: Error #1009: Cannot access a property or method of a null object reference.

Hello guys I am working on a game but i get 1009 error

My Source Code:

package {

import flash.display.MovieClip

import flash.display.StageDisplayState;

import caurina.transitions.*;

import playerio.*

import flash.display.Loader;

import flash.events.MouseEvent;

import flash.events.KeyboardEvent;

import flash.events.Event;

    import flash.display.*;

    import flash.events.*;

    import flash.media.*;

    import flash.net.*;

    import flash.text.*;

import flash.system.Security;

import flash.system.SecurityDomain;

//import flash.security.*;

import flash.display.Stage;

import flash.display.*;

import flash.events.*;

import flash.ui.*;

import flash.net.*;

import flash.utils.*;

import flash.system.*;

import flash.filters.*;

import flash.text.*;

import flash.media.*;

import flash.text.TextField;

import flash.utils.Timer;

    import flash.events.TimerEvent;

import flash.ui.Keyboard;

import fl.transitions.Tween;

    import fl.transitions.easing.*;

    import flash.accessibility.Accessibility;

import flash.system.Security;

import com.freeactionscript.Scrollbar;

import flash.system.Security;

//import fl.controls.Button;

import flash.errors.MemoryError;

import flash.net.URLLoader;

import com.greensock.easing.Back;

import flash.external.*;

public class MyGame extends MovieClip{

private var TheClient;

private var TheConnection;

//private var loginsystem:Login;

function MyGame(){

stop();

PlayerIO.connect(

stage, //Referance to stage

"hill-climb-2-vdpuvptdpkesxpohf8sdiq", //Game id (Get your own at playerio.com)

"public", //Connection id, default is public

"user",             //Username

"", //User auth. Can be left blank if authentication is disabled on connection

null, //Current PartnerPay partner.

handleConnect, //Function executed on successful connect

handleError //Function executed if we recive an error

//});

);  

}

private function handleConnect(client:Client):void{

trace("Sucessfully connected to player.io");

//Set developmentsever (Comment out to connect to your server online)

client.multiplayer.developmentServer = "localhost:8184";

//Create pr join the room test

//username = username.text;

//password = password.text;

client.multiplayer.createJoinRoom(

"test", //Room id. If set to null a random roomid is used

"MyCode", //The game type started on the server

true, //Should the room be visible in the lobby?

{}, //Room data. This data is returned to lobby list. Variabels can be modifed on the server

{}, //User join data

handleJoin, //Function executed on successful joining of the room

handleError //Function executed if we got a join error

);

}

private function handleJoin(connection:Connection):void{

trace("Sucessfully connected to the multiplayer server");

//Add disconnect listener

connection.addDisconnectHandler(handleDisconnect);

//Add listener for messages of the type "hello"

connection.addMessageHandler("hello", function(m:Message){

trace("Recived a message with the type hello from the server");

gotoAndStop("log");

//startgame();

trace("loading buttons");

//inventory_btn.addEventListener(MouseEvent.CLICK, openInventory);

trace("loaded1");

register.addEventListener(MouseEvent.CLICK, lauchRocket2);

trace("loaded2");

function openInventory(event:MouseEvent):void { 

TheConnection.send("login", username.text, pass.text);

}

function lauchRocket2(event:MouseEvent) {

gotoAndStop(4);

//reg.addEventListener(MouseEvent.CLICK,regi);

function regi(event:MouseEvent) {

TheConnection.send("reg", user.text, pass.text);

     }

reg.addEventListener(MouseEvent.CLICK,regi);

}

})

connection.addMessageHandler("loggedin", function(m:Message)

{

gotoAndStop(5);

//}

})

connection.addMessageHandler("registered", function(m:Message)

{

gotoAndStop(5);

//}

})

//})

//Add message listener for users joining the room

connection.addMessageHandler("UserJoined", function(m:Message, userid:uint){

trace("Player with the userid", userid, "just joined the room");

})

//Add message listener for users leaving the room

connection.addMessageHandler("UserLeft", function(m:Message, userid:uint){

trace("Player with the userid", userid, "just left the room");

})

//Listen to all messages using a private function

connection.addMessageHandler("*", handleMessages)

}

private function handleMessages(m:Message){

trace("Recived the message", m)

}

private function handleDisconnect():void{

trace("Disconnected from server")

}

private function handleError(error:PlayerIOError):void{

trace("got",error)

gotoAndStop(3);

}

}

}

Error Line : 107 , 109

Can anyone help me please.