Air Auto Update Error -- Flash Builder Burrito.

Question

This is my first attempt at this, so I may be missing something simple.
I'm not having any luck getting an Air app to automatically update.
If I manually go to  http://localhost/air1/air1.air and redownload the file I will get a popup that asks if I want to update the app, but when I say ok I get this error.
"There was an error checking for updates. Error# 16816"
I haven't found a reason yet,
Any ideas?
update.xml
<?xml version="1.0" encoding="UTF-8"?>
<update xmlns="http://ns.adobe.com/air/framework/update/description/2.5">
  <version>2.0</version>
  <url>http://localhost/air1/air1.air</url>
  <description>1.0 - First version</description>
</update>
file -- air1.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
                       xmlns:s="library://ns.adobe.com/flex/spark"
                       xmlns:mx="library://ns.adobe.com/flex/mx"
                       applicationComplete="init()">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import air.update.events.UpdateEvent;
            import air.update.ApplicationUpdaterUI;
            import mx.controls.Alert;
            protected var appUpdater:ApplicationUpdaterUI = new ApplicationUpdaterUI(); // Used for auto-update
            protected function init():void
                // Check for update
                this.checkUpdate();
                Alert.show("checking update");
            // This function is triggered when the application finished loading.
            // Initialize appUpdater and set some properties
            protected function checkUpdate():void
                // set the URL for the update.xml file
                appUpdater.updateURL = "http://localhost/air1/update.xml";
                appUpdater.addEventListener(UpdateEvent.INITIALIZED, onUpdate);
                appUpdater.addEventListener(ErrorEvent.ERROR, onUpdaterError);
                // Hide the dialog asking for permission for checking for a new update.
                // If you want to see it just leave the default value (or set true).
                appUpdater.isCheckForUpdateVisible = true;
                appUpdater.initialize();
            // Handler function triggered by the ApplicationUpdater.initialize.
            // The updater was initialized and it is ready to take commands.
            protected function onUpdate(event:UpdateEvent):void
                // start the process of checking for a new update and to install
                appUpdater.checkNow();
            // Handler function for error events triggered by the ApplicationUpdater.initialize
            protected function onUpdaterError(event:ErrorEvent):void
                Alert.show(event.toString());
        ]]>
    </fx:Script>
    <s:Button x="47" y="55" label="Button"/>
    <mx:ColorPicker x="61" y="119"/>
    <s:ComboBox x="77" y="216"/>
    <s:ComboBox x="77" y="185"/>
    <s:ComboBox x="77" y="154"/>
</s:WindowedApplication>
file  -- air1-app.xml
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<application xmlns="http://ns.adobe.com/air/application/2.5">
<!-- Adobe AIR Application Descriptor File Template.
    Specifies parameters for identifying, installing, and launching AIR applications.
    xmlns - The Adobe AIR namespace: http://ns.adobe.com/air/application/2.5
            The last segment of the namespace specifies the version
            of the AIR runtime required for this application to run.
    minimumPatchLevel - The minimum patch level of the AIR runtime required to run
            the application. Optional.
-->
    <!-- A universally unique application identifier. Must be unique across all AIR applications.
    Using a reverse DNS-style name as the id is recommended. (Eg. com.example.ExampleApplication.) Required. -->
    <id>air1</id>
    <!-- Used as the filename for the application. Required. -->
    <filename>air1</filename>
    <!-- The name that is displayed in the AIR application installer.
    May have multiple values for each language. See samples or xsd schema file. Optional. -->
    <name>air1</name>
    <!-- A string value of the format <0-999>.<0-999>.<0-999> that represents application version which can be used to check for application upgrade.
    Values can also be 1-part or 2-part. It is not necessary to have a 3-part value.
    An updated version of application must have a versionNumber value higher than the previous version. Required for namespace >= 2.5 . -->
    <versionNumber>2.0.0</versionNumber>
    <!-- A string value (such as "v1", "2.5", or "Alpha 1") that represents the version of the application, as it should be shown to users. Optional. -->
    <!-- <versionLabel></versionLabel> -->
    <!-- Description, displayed in the AIR application installer.
    May have multiple values for each language. See samples or xsd schema file. Optional. -->
    <!-- <description></description> -->
    <!-- Copyright information. Optional -->
    <!-- <copyright></copyright> -->
    <!-- Publisher ID. Used if you're updating an application created prior to 1.5.3 -->
    <!-- <publisherID></publisherID> -->
    <!-- Settings for the application's initial window. Required. -->
    <initialWindow>
        <!-- The main SWF or HTML file of the application. Required. -->
        <!-- Note: In Flash Builder, the SWF reference is set automatically. -->
        <content>[This value will be overwritten by Flash Builder in the output app.xml]</content>
        <!-- The title of the main window. Optional. -->
        <!-- <title></title> -->
        <!-- The type of system chrome to use (either "standard" or "none"). Optional. Default standard. -->
        <!-- <systemChrome></systemChrome> -->
        <!-- Whether the window is transparent. Only applicable when systemChrome is none. Optional. Default false. -->
        <!-- <transparent></transparent> -->
        <!-- Whether the window is initially visible. Optional. Default false. -->
        <!-- <visible></visible> -->
        <!-- Whether the user can minimize the window. Optional. Default true. -->
        <!-- <minimizable></minimizable> -->
        <!-- Whether the user can maximize the window. Optional. Default true. -->
        <!-- <maximizable></maximizable> -->
        <!-- Whether the user can resize the window. Optional. Default true. -->
        <!-- <resizable></resizable> -->
        <!-- The window's initial width in pixels. Optional. -->
        <!-- <width></width> -->
        <!-- The window's initial height in pixels. Optional. -->
        <!-- <height></height> -->
        <!-- The window's initial x position. Optional. -->
        <!-- <x></x> -->
        <!-- The window's initial y position. Optional. -->
        <!-- <y></y> -->
        <!-- The window's minimum size, specified as a width/height pair in pixels, such as "400 200". Optional. -->
        <!-- <minSize></minSize> -->
        <!-- The window's initial maximum size, specified as a width/height pair in pixels, such as "1600 1200". Optional. -->
        <!-- <maxSize></maxSize> -->
    <autoOrients>false</autoOrients>
    <fullScreen>false</fullScreen>
    <visible>false</visible>
  </initialWindow>
    <!-- We recommend omitting the supportedProfiles element, -->
    <!-- which in turn permits your application to be deployed to all -->
    <!-- devices supported by AIR. If you wish to restrict deployment -->
    <!-- (i.e., to only mobile devices) then add this element and list -->
    <!-- only the profiles which your application does support. -->
    <!-- <supportedProfiles>desktop extendedDesktop mobileDevice extendedMobileDevice</supportedProfiles> -->
    <!-- The subpath of the standard default installation location to use. Optional. -->
    <!-- <installFolder></installFolder> -->
    <!-- The subpath of the Programs menu to use. (Ignored on operating systems without a Programs menu.) Optional. -->
    <!-- <programMenuFolder></programMenuFolder> -->
    <!-- The icon the system uses for the application. For at least one resolution,
    specify the path to a PNG file included in the AIR package. Optional. -->
    <!-- <icon>
        <image16x16></image16x16>
        <image32x32></image32x32>
        <image36x36></image36x36>
        <image48x48></image48x48>
        <image72x72></image72x72>
        <image128x128></image128x128>
    </icon> -->
    <!-- Whether the application handles the update when a user double-clicks an update version
    of the AIR file (true), or the default AIR application installer handles the update (false).
    Optional. Default false. -->
    <!-- <customUpdateUI></customUpdateUI> -->
    <!-- Whether the application can be launched when the user clicks a link in a web browser.
    Optional. Default false. -->
    <!-- <allowBrowserInvocation></allowBrowserInvocation> -->
    <!-- Listing of file types for which the application can register. Optional. -->
    <!-- <fileTypes> -->
        <!-- Defines one file type. Optional. -->
        <!-- <fileType> -->
            <!-- The name that the system displays for the registered file type. Required. -->
            <!-- <name></name> -->
            <!-- The extension to register. Required. -->
            <!-- <extension></extension> -->
            <!-- The description of the file type. Optional. -->
            <!-- <description></description> -->
            <!-- The MIME content type. -->
            <!-- <contentType></contentType> -->
            <!-- The icon to display for the file type. Optional. -->
            <!-- <icon>
                <image16x16></image16x16>
                <image32x32></image32x32>
                <image48x48></image48x48>
                <image128x128></image128x128>
            </icon> -->
        <!-- </fileType> -->
    <!-- </fileTypes> -->
    <!-- Specify Android specific tags that get passed to AndroidManifest.xml file. -->
    <!--<android>
        <manifestAdditions>
        <![CDATA[
            <manifest android:installLocation="auto">
                <uses-permission android:name="android.permission.INTERNET"/>
                <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
                <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
                <uses-configuration android:reqFiveWayNav="true"/>
                <supports-screens android:normalScreens="true"/>
                <uses-feature android:required="true" android:name="android.hardware.touchscreen.multitouch"/>
                <application android:enabled="true">
                    <activity android:excludeFromRecents="false">
                        <intent-filter>
                            <action android:name="android.intent.action.MAIN"/>
                            <category android:name="android.intent.category.LAUNCHER"/>
                        </intent-filter>
                    </activity>
                </application>
            </manifest>
        ]]>
        </manifestAdditions>
    </android> -->
    <!-- End of the schema for adding the android specific tags in AndroidManifest.xml file -->
</application>

Answer 1

This appears to be a Flex question. Please try posting to the Flex forums here http://forums.adobe.com/community/flex/flex_general_discussion for better response.