Clickable image in GridViewColumn

Question

I want to add populate an listeview and every row should have an icon, of a pen showing it can be edited. But icon dosent show. :S

<StackPanel Grid.Row="1" Margin="0,0,0,0" >
            <ListView ItemsSource="{Binding TimeListView}">
                <ListView.View>
                    <GridView>
                        <GridViewColumn Width="200" Header="Day" 
                    DisplayMemberBinding="{Binding Date}"  />
                        <GridViewColumn Width="200" Header="Time"  
                    DisplayMemberBinding="{Binding Time}" />
                        <GridViewColumn Width="50">
                            <GridViewColumn.CellTemplate>
                                <DataTemplate>
                                    <Image Source="pack://siteoforigin:,,,/editIcon.png" MouseUp="EditClick"/>
                                </DataTemplate>
                            </GridViewColumn.CellTemplate>
                        </GridViewColumn>
                    </GridView>
                </ListView.View>
            </ListView>
        </StackPanel>

prepared an fuction I will use on the image when mouseUp:

private void EditClick(object sender, RoutedEventArgs e)

The image is an quite large png which I want to autoscale later on, but thats another problem. :)

So why isnt it showing and is the mouseUp implementation ok?

Br