wp7 popup blocking textbox in popup - silverlight

Question

I have a popup that opens on the MainPage with a couple of textboxes. When ever you focus on the lower textbox the keyboard obscures it from view. Usually the textboxes slide into view. i don't know why that is not happening here.
please help!
<UserControl x:Class="Controls.EditControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:SampleData="clr-namespace:SampleData"
mc:Ignorable="d"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
Height="800" Width="480"
d:DataContext="{d:DesignData ../SampleData/sampleEditPopup.xaml}">
<Grid x:Name="LayoutRoot" Background="#FF000000" Opacity="0.995">
<StackPanel Margin="0,20,0,0" Orientation="Horizontal" VerticalAlignment="Top">
<TextBlock TextWrapping="Wrap" Text="Name" HorizontalAlignment="Left" Height="26" Margin="15,10,0,10" Width="110" TextAlignment="Right"/>
<TextBox x:Name="tb_name"
TextWrapping="Wrap"
Width="340" Height="75"
Margin="10,13,15,12"
InputScope="Text" MaxLength="1000"
Text="{Binding Title, Mode=TwoWay}"/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,150,0,0" VerticalAlignment="Top">
<TextBlock TextWrapping="Wrap" Text="Description" HorizontalAlignment="Left" Height="26" Margin="15,40,0,10" Width="110" VerticalAlignment="Top" TextAlignment="Right"/>
<TextBox x:Name="tb_description"
TextWrapping="Wrap"
Width="340" Height="254"
Margin="10,13,15,12"
InputScope="Text" MaxLength="1000"
Text="{Binding Description, Mode=TwoWay}"/>
</StackPanel>
</Grid>
and here is the code to open it:
EditControl ec = new EditControl();
ec.Title = cm.Title;
ec.Description = cm.Description;
//sets appbar icons for accepting values
setEditIcons();
Popup edit = new Popup() { Child = ec, Tag = this };
edit.Closed += new EventHandler(edit_Closed);
edit.IsOpen = true;

Answer 1

from a UX perspective I'd heavily recommend against having any partial popup/overlay that has more than 1 or 2 buttons. It's just not done in WP7. If you have a form you'd like folks to fill out move it to its own page. Either by letting the user navigate to that page, or by introducing a new transient page (that cannot be navigated back into) prior to the current page.
You'll have more problems than just the on-screen keyboard in with form overlays. You'll need to change the AppBar to have "V" and "X" buttons for any data entry, you'll need to manage focus not slipping back into under the overlay/popup, you'll need to make sure the "back" button closes the popup, etc.
IMO The best approach is a simple and consistent UX.