grid in heirarchy loads very slowly

[Anjali]

Hi,
I have a grid upto four levels in heirarchy,When I expands the grid it takes lots of seconds to expand the grid,My code is:

<UserControl x:Class="WPF_WindowPO.UcWorksheet"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             mc:Ignorable="d"       xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"                 
      xmlns:telerikGrid="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Gridview"
          Loaded="UserControl_Loaded" d:DesignHeight="614" d:DesignWidth="940">
<grid>
<telerik:RadGridView RowIndicatorVisibility="Collapsed" AutoGenerateColumns="True" ItemsSource="{Binding}" ></telerik:RadGridView>
</grid>
</UserControl >
Also please let me know how to alogn the columns of header and heirarchy?
Any help will be highly appreciated..

Thanks