Chat user is not getting message from the other users

Question

In my application when user [A] initiate the chat with user[B]  , I am facing following issues
-          User[B] is not getting initiation notification so that I am unable to open chat pod for user [A] on user[B] application
-          Due to above problem , User[B] not getting any message sent by the User[A]
-          User[A] can send only one message and it is displayed on simple chat pod
when User[A]tries to send more then one message it is not displayed on simple chat pod but on the console I can see the messages
following is sample code
 public function connectChat() :void {
_collectionNode =
new CollectionNode();_collectionNode.sharedID = NOTIFICATION_COLLECTION_NODE;
_collectionNode.connectSession =
this.connectSession;_collectionNode.addEventListener(CollectionNodeEvent.SYNCHRONIZATION_CHANGE, onSynchronizationChange,
false, 0, true);_collectionNode.addEventListener(CollectionNodeEvent.ITEM_RECEIVE, onItemReceive,
false, 0, true);_collectionNode.subscribe();
/*** @private
* Handles the creation of a collection node if it does not already exist
 protected function onSynchronizationChange(event:CollectionNodeEvent):void { 
if (_collectionNode.isSynchronized) { 
if (!_collectionNode.isNodeDefined(START_CHAT_LIST) && _collectionNode.canUserConfigure(connectSession.userManager.myUserID)) {_collectionNode.createNode(START_CHAT_LIST,
new NodeConfiguration(UserRoles.VIEWER, UserRoles.VIEWER, true, false, true,false, NodeConfiguration.STORAGE_SCHEME_QUEUE));}
 public function connectChat() :void{
trace('connectChat');_collectionNode =
new CollectionNode();_collectionNode.sharedID = NOTIFICATION_COLLECTION_NODE;
_collectionNode.connectSession =
this.connectSession;_collectionNode.addEventListener(CollectionNodeEvent.SYNCHRONIZATION_CHANGE, onSynchronizationChange,
false, 0, true);_collectionNode.addEventListener(CollectionNodeEvent.ITEM_RECEIVE, onItemReceive,
false, 0, true);_collectionNode.subscribe();
/*** @private
* Handles the creation of a collection node if it does not already exist
 protected function onSynchronizationChange(event:CollectionNodeEvent):void { 
if (_collectionNode.isSynchronized) { 
//Creates the nodes if they don't exist 
if (!_collectionNode.isNodeDefined(START_CHAT_LIST) && _collectionNode.canUserConfigure(connectSession.userManager.myUserID)) {_collectionNode.createNode(START_CHAT_LIST,
new NodeConfiguration(UserRoles.VIEWER, UserRoles.VIEWER, true, false, true,false, NodeConfiguration.STORAGE_SCHEME_QUEUE));}
/*** Checks if a chat is going to be started with this specific user
 protected function onItemReceive(event:CollectionNodeEvent):void { 
var item:MessageItem = event.item; 
var openChatEvent:OpenChatEvent = OpenChatEvent.ToOpenChatEvent( item.body, OpenChatEvent.OPEN_CHAT ); 
switch (item.nodeName) { 
case START_CHAT_LIST: 
trace("Starting Chat Notified");  
if( openChatEvent.userId && openChatEvent.userId == this.connectSession.userManager.myUserID ){
this.dispatchEvent( openChatEvent ); 
if( this._collectionNode.isSynchronized ) 
this._collectionNode.retractItem( START_CHAT_LIST, openChatEvent.roomId );}
break;}
/*** Publishes a request for someone to join a chat
 public function publishChatRequest(notificationEvent : NotificationEvent) :void { 
if( this.connectSession.userManager.getUserDescriptor( notificationEvent.userID ) ){
var openChatEvent:OpenChatEvent = new OpenChatEvent( OpenChatEvent.PUBLISH_CHAT,null,notificationEvent.sharedID, notificationEvent.userNotificationList, null, notificationEvent.userID ); 
if( this.presenceUsers )openChatEvent.descriptors =
this.presenceUsers; _collectionNode.publishItem(
new MessageItem( START_CHAT_LIST, openChatEvent, openChatEvent.roomId ) );}
else{
Alert.show(
"User "+ notificationEvent.userID + " is not logged in.", "Publish Error" );}

Answer 1

A) are these methods copied twice in the code here on purpose?
   connectChat() and onSynchronizationChange is repeated in code due copy paste mistake
B) are both users subscribing to _collectionNode right away? Do each of them
get to onSynchronizationChange?
   Yes , each of them get to onSynchronizationChange
C) If you put a breakpoint in onSynchronizationChange, do you see the node
get created? Do you see it in the dev console?
Yes , it is creating a node
D) Is user B receiving an onItemReceive at all? Is user A?
Yes , it is creating a node
Now both the user getting chat message, have following issue
When user A initiate the chat with user B this action is not opening chat pod / window on user B end which shows user A has initiated chat with user B
But when user B click on user A name to initiate the chat, this action opens a chat window and user B can see message send by user A
Above scenario is not normal chat behavior in which other user gets the notification of chat . what could be the problem