Ling-to-Sql issue when bind SQL to WP8 using WebSe

I have just tried to create my first WP8 application which would Bind data from SQL Database. I followed this tutorial but only black page appears.

As there is no ListBox in WP8 tools I used LongListSelector as following:

MainPage.xaml

 shell:SystemTray.IsVisible="True">

<phone:PhoneApplicationPage.Resources>
    <DataTemplate x:Key="ToursDataTemplate">
        <StackPanel Orientation="Horizontal">
            <TextBlock Margin="10" Text="{Binding name}"/>

        </StackPanel>
    </DataTemplate>


</phone:PhoneApplicationPage.Resources>

<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="9*"/>
        <ColumnDefinition Width="7*"/>
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>


    <phone:LongListSelector 
        x:Name="MyLongListSelectors"

        ItemsSource="{Binding}" 
        ItemTemplate="{StaticResource ToursDataTemplate}"
         />

This is my MainPage.xaml.cs

using PhoneApp1.Resources;
using PhoneApp1.ToursServiceReference1;


namespace PhoneApp1
{
    public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();

            // Sample code to localize the ApplicationBar
            //BuildLocalizedApplicationBar();
        }
        private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
        {
            ToursServiceReference1.ToursService1Client serviceClient = new ToursServiceReference1.ToursService1Client();

            serviceClient.GetAllKlientsCompleted += new EventHandler<ToursServiceReference1.GetAllKlientsCompletedEventArgs>(serviceClient_GetAllKlientsCompleted);

        serviceClient.GetAllKlientsAsync();
    }
    private void serviceClient_GetAllKlientsCompleted(object sender, ToursServiceReference1.GetAllKlientsCompletedEventArgs e)
    {
        if (e.Result != null)
        {
            MyLongListSelectors.ItemsSource = e.Result;
        }

    }

In case that I should provide more information please let me know. Hope not to receive down-votes as this is quiet low-quality question.

There is no sign of error or anything similar.

Thank you everyone for your time.

What do you expect to see exactly?

You are doing nothing inside serviceClient_GetAllKlientsCompleted method. Your list will always be empty as you are not providing it any data to display

private void serviceClient_GetAllKlientsCompleted(object sender, ToursServiceReference1.GetAllKlientsCompletedEventArgs e)
        {
            if (e.Result != null)
            {
                //set the data context of list here 
            }

        }