Unable to go Fullscreen on iOS Problem - Air 3.1

I am trying to run an app in Fullscreen mode on IOS. (latest iPod touch) The app is running in GPU mode and is set to be portrait.  For some reason though I alway see the iOS UI status bar. The app is being compiled with AIR 3.1 sdk, Is there anything I need to specifiy in the application descriptor other than the obvious?  I am including the iPhone and initialWindow markup for reference.

    <iPhone>

        <InfoAdditions><![CDATA[        

            <key>UIStatusBarStyle</key>

            <string>UIStatusBarStyleBlackOpaque</string>

            <key>UIRequiresPersistentWiFi</key>

            <string>NO</string>

            <key>UIPrerenderedIcon</key> 

            <true/>

            <key>UIDeviceFamily</key>

            <array>

                <!-- iPhone support -->

                <string>1</string>

                <!-- iPad support -->

                <!--<string>2</string>-->

            </array>

        ]]></InfoAdditions>

        <requestedDisplayResolution>high</requestedDisplayResolution>

    </iPhone>

    <initialWindow>

        <title>flashpunk-ios</title>

        <content>flashpunkios.swf</content>

        <visible>true</visible>

        <renderMode>gpu</renderMode>

        <fullScreen>true</fullScreen>

        <autoOrients>true</autoOrients>

        <aspectRatio>portrait</aspectRatio>

    </initialWindow>