Hi,

I am trying to use XamSpellChecker in a popup with a textbox as its spell check target as shown below:

<ig:XamSpellChecker x:Name="igSpellChecker" MaxHeight="20">
                                                        <ig:XamSpellChecker.SpellCheckTargets>
                                                            <Binding ElementName="NarrativeTextBox" Path="Text" Mode="TwoWay"/>
                                                        </ig:XamSpellChecker.SpellCheckTargets>
                                                    </ig:XamSpellChecker>

                                                    <TextBox x:Name="NarrativeTextBox" Grid.Row="0"
                                                           Grid.Column="1"
                                                           Text="{Binding displayValue,Mode=TwoWay}"
                                                           TextWrapping="Wrap"
                                                           HorizontalAlignment="Left"
                                                           VerticalAlignment="Top"
                                                           Width="300" AcceptsReturn="True"
                                                           FontFamily="{StaticResource BaseFont_Family}"
                                                           FontSize="{StaticResource BaseFont_Size}"  
                                                           >
                                                    <TextBox.Foreground>
                                                        <SolidColorBrush Color="{StaticResource Black}"/>
                                                    </TextBox.Foreground>
                                                </TextBox> 

And when the SpellCheck method is called, a null-reference exception is thrown by the method.  When I wrote a test application with just a popup with a text box and the spell checker, it worked fine.  But as a part of a bigger application, a null reference exception is thrown.  Any idea what might have made it throw that exception?