I want a popup to appear every time I hover a togglebutton. It then needs to stay open until I click somewhere else in the application. The code below works fine on start up but as soon as I check or uncheck the togglebutton the popup refuses to appear. Any ideas on what I'm doing wrong?

The WPF code

        <ToggleButton Name="btnLogFile" Style="{StaticResource StandardToggle}"

                      Grid.Row="1" Grid.Column="3" Margin="0,3,3,0" 

                      MouseEnter="btnLogFile_MouseEnter">

            <Path Margin="7" SnapsToDevicePixels="True" Stretch="Uniform"

                Stroke="{StaticResource TextLight}" StrokeThickness="2">

                <Path.Data>

                    <GeometryGroup FillRule="Nonzero">

                        <PathGeometry Figures="M 0 0 L 20 0 L 20 10 L 30 10 L 30 40 L 0 40 Z" />

                        <PathGeometry Figures="M 20 0 L 22 0 L 30 8 L 30 10" />

                    </GeometryGroup>

                </Path.Data>

            </Path>

        </ToggleButton>

        <Popup Name="popLogFile"

               PlacementTarget="{Binding ElementName=btnLogFile}" Placement="Custom"

               HorizontalOffset="0" VerticalOffset="0"

               MouseLeftButtonDown="popLogFile_MouseLeftButtonDown">

            <Border Background="{StaticResource BackgroundDark}" BorderBrush="{StaticResource TextBoxBorder}" BorderThickness="1"

                    Width="300" Height="Auto">

                <Grid Margin="3">

                    <Grid.ColumnDefinitions>

                        <ColumnDefinition Width="Auto" />

                        <ColumnDefinition Width="3" />

                        <ColumnDefinition Width="*" />

                        <ColumnDefinition Width="3" />

                        <ColumnDefinition Width="22" />

                    </Grid.ColumnDefinitions>

                    <Grid.RowDefinitions>

                        <RowDefinition Height="22" />

                    </Grid.RowDefinitions>

                    <TextBlock Margin="0,1" Grid.Row="0" Grid.Column="0" Foreground="{StaticResource TextLight}" HorizontalAlignment="Right">Directory</TextBlock>

                    <TextBox Name="logfilePath" Grid.Row="0" Grid.Column="2" Grid.ColumnSpan="3"

                             Style="{StaticResource StandardTextBox}"

                             Foreground="{StaticResource TextLight}">

                        C:\logfile.txt

                    </TextBox><!-- Button made invisible for the time being -->

                    <Button Name="btnBrowseLogfile" Style="{StaticResource StandardButton}" Grid.Row="0" Grid.Column="4" Visibility="Collapsed">...</Button>

                </Grid>

            </Border>

        </Popup>

And the togglebutton's mouse event:

    private void btnLogFile_MouseEnter(object sender, MouseEventArgs e)

    {

        this.popLogFile.IsOpen = true;

        this.popLogFile.StaysOpen = false;

    }