My Grid containing Microsoft Ads dissapears after 1 second

UPDATE Actually, without changing anything in the code, it works fine today. A night of good sleep was all! I guess Microsoft must have had problems yesterday with their ad-server. Anyway, it's working again now :-)

My Grid containing the Ads is dissapearing after 1 second. It did work, but now i just see the white border, and then it dissapears. This is the xaml code, and in the code behind, I set the TestMode to true. Can anyone see why this is happening? I'm new to xaml, so it might just be something wrong with my xaml code?

<phone:PhoneApplicationPage xmlns:my="clr-namespace:Microsoft.Advertising.Mobile.UI;assembly=Microsoft.Advertising.Mobile.UI"  
x:Class="GeoFlick.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="696"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True" Loaded="PhoneApplicationPage_Loaded">开发者_Go百科

<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <Grid.RenderTransform>
        <ScaleTransform x:Name="SpinnerScale" ScaleX="1" ScaleY="1" />
    </Grid.RenderTransform>
    <!--TitlePanel contains the name of the application and page title-->
    <Grid Margin="0,0,0,5" Grid.Row="0">

        <TextBlock x:Name="ApplicationTitle" HorizontalAlignment="Left" Text="GeoFlick" Style="{StaticResource PhoneTextNormalStyle}" RenderTransformOrigin="0.5,0.5">
            <TextBlock.Foreground>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FFFF048B" Offset="0"/>
                    <GradientStop Color="#FFA824B1" Offset="1"/>
                </LinearGradientBrush>
            </TextBlock.Foreground>
        </TextBlock>

        <TextBlock x:Name="ImageLoading" Margin="0,0,12,0" TextWrapping="NoWrap" HorizontalAlignment="Right">
            <TextBlock.Foreground>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FF434242" Offset="0"/>
                    <GradientStop Color="#FFA9A7A7" Offset="1"/>
                </LinearGradientBrush>
            </TextBlock.Foreground>
        </TextBlock>

    </Grid>
    <!--ContentPanel - place additional content here-->
    <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
        <Image x:Name="FlickrImage"/>
        <Grid x:Name="spinner" Background="Transparent" Visibility="Collapsed">
            <Canvas RenderTransformOrigin="0.5,0.5" Width="120" Height="120" Margin="161,173,175,264">
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="20" Canvas.Top="10" Stretch="Fill" Fill="#FFFF048B" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="2.86816" Canvas.Top="29.9581" Stretch="Fill" Fill="#FF0064CE" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="5.03758e-006" Canvas.Top="57.9341" Stretch="Fill" Fill="#FF1973D4" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="12.1203" Canvas.Top="83.3163" Stretch="Fill" Fill="#FF2E7FD4" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="36.5459" Canvas.Top="98.138" Stretch="Fill" Fill="#FF3F86D0" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="64.6723" Canvas.Top="96.8411" Stretch="Fill" Fill="#674588CE" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="87.6176" Canvas.Top="81.2783" Stretch="Fill" Fill="#675E97D4" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="98.165" Canvas.Top="54.414" Stretch="Fill" Fill="#67719FD2" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="92.9838" Canvas.Top="26.9938" Stretch="Fill" Fill="#6782A9D4" />
                <Ellipse Width="21.835" Height="21.862" Canvas.Left="47.2783" Canvas.Top="0.5" Stretch="Fill" Fill="#FFFF048B" />
                <Canvas.RenderTransform>
                    <RotateTransform x:Name="SpinnerRotate" Angle="3" />
                </Canvas.RenderTransform>
                <Canvas.Triggers>
                    <EventTrigger RoutedEvent="ContentControl.Loaded">
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation Storyboard.TargetName="SpinnerRotate" Storyboard.TargetProperty="(RotateTransform.Angle)" From="0" To="360" Duration="0:0:01" RepeatBehavior="Forever" />
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </Canvas.Triggers>
            </Canvas>
        </Grid>

    </Grid>

    <Grid x:Name="ImageInfo" Grid.Row="2">
        <TextBlock x:Name="ImageTitle" HorizontalAlignment="Center" VerticalAlignment="Top" Margin="0,3,0,0" Foreground="#FF9A9898" />            
    </Grid>

    <Grid x:Name="Ads" Grid.Row="3" Visibility="Visible">
        <my:AdControl Height="80" Name="adControl1" Width="480" ApplicationId="test_client" AdUnitId="TextAd" AdModel="Contextual" Foreground="White" />
    </Grid>        

</Grid>


<!--Sample code showing usage of ApplicationBar-->
<phone:PhoneApplicationPage.ApplicationBar>
    <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
        <shell:ApplicationBarIconButton IconUri="/icons/appbar.sync.rest.png" Text="Replay" Click="ApplicationBarIconButton_Click_1" />
        <shell:ApplicationBarIconButton IconUri="/icons/appbar.feature.settings.rest.png"  Text="Settings" Click="ApplicationBarIconButton_Click" />
    </shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>

Here are some information for the SDK that might help:

In addition, you must set the following properties in order to start receiving real ads. You will not receive real ads from the mobile ad server if you do not set the following properties.

ApplicationId The application identifier (ApplicationId) is provided by Microsoft pubCenter. Refer to the Getting Access to Microsoft pubCenter and Receiving Ads topic for information about how to obtain the ApplicationId.

AdUnitId The ad unit identifier (AdUnitId) is provided by Microsoft pubCenter when the ad unit is created. Refer to the Getting Access to Microsoft pubCenter and Receiving Ads topic for information about how to obtain the AdUnitId.

TestMode false