Flash Builder 4.5 Application SDK 2.6 Auto Update Fails

I have developed a few applications using Flex Builder 3 and have recently switched to using Flash Builder 4.5 for my air application developement of new applications. ApplicationUpdaterUI worked fine in FB3, but now in FB4.5 it fails with:

[StatusUpdateErrorEvent (type=updateError text=unknown update descriptor namespace id=16815 + subErrorID=0)]

My Application descriptor reads:

<application xmlns="http://ns.adobe.com/air/application/2.6">

So I changed my update descriptor in my Update.xml on the server from 1.0(for FB3) to 2.6 like so:

<update xmlns="http://ns.adobe.com/air/framework/update/description/2.6">

This give me the error above...

If I change the update descriptor to 2.5 like so:

<update xmlns="http://ns.adobe.com/air/framework/update/description/2.5">

I get the following Error:

[StatusUpdateErrorEvent (type=updateError text=Application namespace and update descriptor namespace are not compatible id=16831 + subErrorID=0)]

I have read in multiple forums that you need to switch the updater descriptor back to 2.5, or even back to 1.0. I have tried both of these, and it still will not work! Here is my updater code. I just put this flex component on the start state of my application. I believe this is all correct, but please fill me in if I am wrong...

<?xml version="1.0" encoding="utf-8"?>

<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"

xmlns:s="library://ns.adobe.com/flex/spark"

xmlns:mx="library://ns.adobe.com/flex/mx" width="400" height="32"

creationComplete="checkForUpdate()">

<fx:Declarations>

<!-- Place non-visual elements (e.g., services, value objects) here -->

</fx:Declarations>

<fx:Script>

<![CDATA[

import air.update.ApplicationUpdaterUI;

import air.update.events.StatusUpdateErrorEvent;

import air.update.events.UpdateEvent;

import flash.events.ErrorEvent;

import mx.controls.Alert;

private var appUpdater:ApplicationUpdaterUI = new ApplicationUpdaterUI();

private function checkForUpdate():void{

appUpdater.updateURL = "http://test.example.com/root/updates/update.xml";

appUpdater.isCheckForUpdateVisible = false;

appUpdater.addEventListener(UpdateEvent.INITIALIZED, onUpdate);

appUpdater.addEventListener(ErrorEvent.ERROR, onError);

appUpdater.addEventListener(StatusUpdateErrorEvent.UPDATE_ERROR, onUpdateError);

appUpdater.initialize();

}

private function onError(event:ErrorEvent):void{

Alert.show(event.toString());

}

private function onUpdate(event:UpdateEvent):void{

appUpdater.checkNow();

}

private function onUpdateError(event:ErrorEvent):void{

Alert.show(event.toString());

}

]]>

</fx:Script>

</s:Group>

And here is my update.xml...

<?xml version="1.0" encoding="utf-8"?>

<update xmlns="http://ns.adobe.com/air/framework/update/description/2.5">

<version>1.0.1</version>

<url>http://test.example.com/root/updates/Application_1.0.1.air</url>

<description><![CDATA[

1.0.1 (07/20/2011)

Testing the update code

]]></description>

</update>

PLEASE HELP!!