How to display Tab Control inside Gridview

[Zealous]

Hi..
I want to show tab control inside Gridview.
I try it but it does not display tabcontrol inside Gridview. When i expand detail that time it does not display Tab control it just show gridview.
Please help me.
My Code is below.
My Testpages.xaml is like

<UserControl x:Class="RadGridView_SL4_AR_56.Testpages"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    d:DesignHeight="300" d:DesignWidth="400">
    <Grid x:Name="LayoutRoot">

        <telerik:RadGridView x:Name="RadGridView1" AutoGenerateColumns="True" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" RowIndicatorVisibility="Collapsed"
                             IsReadOnly="True" ShowGroupPanel="False" ColumnWidth="SizeToHeader" AlternationCount="2"
                             ItemsSource="{Binding LstRecords}" >
            <telerik:RadGridView.RowDetailsTemplate>
                <DataTemplate>
                    <telerik:RadTabControl >
                        <telerik:RadTabItem Header="WorkOrder">
                            <telerik:RadGridView Name="dgdWorkOrders" ShowGroupPanel="False" RowIndicatorVisibility="Collapsed"
                                                                 ItemsSource="{Binding DetailItem}"
                                                                 AutoGenerateColumns="True">
                            </telerik:RadGridView>
                        </telerik:RadTabItem>
                        <telerik:RadTabItem Header="Inspection">
                            <telerik:RadGridView Name="dgdInspection" ShowGroupPanel="False" RowIndicatorVisibility="Collapsed"
                                                        ItemsSource="{Binding DetailItemDet}" AutoGenerateColumns="True">
                            </telerik:RadGridView>
                        </telerik:RadTabItem>
                    </telerik:RadTabControl>
                </DataTemplate>
            </telerik:RadGridView.RowDetailsTemplate>
        </telerik:RadGridView>
    </Grid>
</UserControl>

My Testpages.xaml.cs is like

public partial class Testpages : UserControl, INotifyPropertyChanged
    {
        ObservableCollection<InspectionAuthorisationsList> lstRecords = new ObservableCollection<InspectionAuthorisationsList>();
        public ObservableCollection<InspectionAuthorisationsList> LstRecords
        {
            get { return lstRecords; }
            set
            {
                lstRecords = value;
                RaisePropertyChanged("LstRecords");
            }
        }
        public Testpages()
        {
            InitializeComponent();
            var definition = RadGridView1.TableDefinition;
            var d = new GridViewTableDefinition();
            d.Relation = new PropertyRelation("DetailItem");
            definition.ChildTableDefinitions.Add(d);
            definition = d;
            for (int i = 0; i < 10; i++)
            {
                InspectionAuthorisationsList ia = new InspectionAuthorisationsList();
                ia.ID = i;
                ia.InspectionReference = String.Format("Name{0}", i);
                if (i % 2 == 0)
                {
                    ia.DetailItem = new List<RepairRequestsForInspectionAuthorisationsList>();
                    for (int j = 0; j < 2; j++)
                    {
                        RepairRequestsForInspectionAuthorisationsList mo1 = new RepairRequestsForInspectionAuthorisationsList();
                        mo1.InspectionID = j;
                        mo1.Problem = String.Format("Problem : {0}", j);
                        mo1.RequestID = i;
                        ia.DetailItem.Add(mo1);
                    }

                    ia.DetailItemDet = new List<RepairRequestsDetail>();
                    for (int k = 0; k < 2; k++)
                    {
                        RepairRequestsDetail mo1 = new RepairRequestsDetail();
                        mo1.InspectionID = i;
                        mo1.ProblemDet = String.Format("Problem Det : {0}", k);
                        mo1.DetID = k;
                        ia.DetailItemDet.Add(mo1);
                    }
                }
                lstRecords.Add(ia);
            }
            LstRecords = lstRecords;
            RadGridView1.ItemsSource = LstRecords;
        }

        protected virtual void RaisePropertyChanged(string propertyName)
        {
            var handler = this.PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        private void RadGridView1_DataLoading(object sender, Telerik.Windows.Controls.GridView.GridViewDataLoadingEventArgs e)
        {
            var grid = (GridViewDataControl)sender;
            grid.ShowGroupPanel = false;
            grid.AutoGenerateColumns = false;
            if (grid.Name == "")
            {
                grid.Columns.Add(new GridViewDataColumn() { Header = "RequestID", DataMemberBinding = new Binding("RequestID") });
                grid.Columns.Add(new GridViewDataColumn() { Header = "Problem", DataMemberBinding = new Binding("Problem") });
            }
            else
            {
                grid.Columns.Add(new GridViewDataColumn() { DataMemberBinding = new Binding("ID") });
                grid.Columns.Add(new GridViewDataColumn() { DataMemberBinding = new Binding("InspectionReference") });
            }
        }
    }
    public class InspectionAuthorisationsList
    {
        public int ID { get; set; }
        public string InspectionReference { get; set; }
        public List<RepairRequestsForInspectionAuthorisationsList> DetailItem { get; set; }
        public List<RepairRequestsDetail> DetailItemDet { get; set; }
    }
    public class RepairRequestsForInspectionAuthorisationsList
    {
        public int InspectionID { get; set; }
        public int RequestID { get; set; }
        public string Problem { get; set; }
    }
    public class RepairRequestsDetail
    {
        public int InspectionID { get; set; }
        public int DetID { get; set; }
        public string ProblemDet { get; set; }
    }