What could be wrong in the following code?

[CODE]

<Page xmlns:my="clr-namespace:Xceed.Wpf.DataGrid;assembly=Xceed.Wpf.DataGrid"  x:Class="TimeSheetClient.TimeSheet"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="TimeSheet" xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
    <Grid>
        <Grid.Resources>
            <xcdg:DataGridCollectionViewSource x:Key="cvs_usersgroups" Source="{Binding Source ={x:Static Application.Current}, Path=UsersGroups}" />
        </Grid.Resources>
        <my:DataGridControl Name="UsersGroupsGrid" AutoCreateDetailConfigurations="True" ItemsSource="{Binding Source={StaticResource cvs_usersgroups}}">
            <my:DataGridControl.View>
                <xcdg:TableView UseDefaultHeadersFooters="False">
                    <xcdg:TableView.Headers>
                        <DataTemplate>
                            <xcdg:InsertionRow />
                        </DataTemplate>
                    </xcdg:TableView.Headers>
                    <xcdg:TableView.FixedHeaders>
                        <DataTemplate>
                            <xcdg:HierarchicalGroupByControl xcdg:TableView.CanScrollHorizontally="False" />
                        </DataTemplate>
                        <DataTemplate>
                            <xcdg:ColumnManagerRow />
                        </DataTemplate>
                    </xcdg:TableView.FixedHeaders>
                    <xcdg:TableView.Theme>
                        <xcdg:AeroNormalColorTheme />
                    </xcdg:TableView.Theme>
                </xcdg:TableView>
            </my:DataGridControl.View>
        </my:DataGridControl>
    </Grid>
</Page>
[/CODE]

 and code behind:

[CODE]

 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using TimeSheetClient.TimeSheetServiceReference;

namespace TimeSheetClient
{
    /// <summary>
    /// Interaction logic for TimeSheet.xaml
    /// </summary>
    public partial class TimeSheet : Page
    {
        private static TimeSheetDataSet.UsersGroupsDataTable usersGroups;

        public static TimeSheetDataSet.UsersGroupsDataTable UsersGroups
        {
            get { return TimeSheet.usersGroups; }
        }

        static TimeSheet()
        {
            TimeSheetServiceClientInstance serviceClientInstance = TimeSheetServiceClientInstance.Instance;
            usersGroups = serviceClientInstance.serviceClient.UsersGroups();
        }

        public TimeSheet()
        {
            InitializeComponent();
        }
    }
}

[/CODE]
 

i dont get data in the grid not even the columns as well. i did something like the example in the documentation. 

Your binding is wrong in the DataGridCollectionViewSource:

<xcdg:DataGridCollectionViewSource x:Key="cvs_usersgroups" Source="{Binding Source ={x:Static Application.Current}, Path=UsersGroups}" />

Your UsersGroups property is not located in the Current Application page but rather TimeSheet. Your output window should be reporting this invalid binding.