Trouble with autocompletebox in a datagrid for silverlight 4

Hello, I'm new to silverlight and I am tasked with changing the datagrid textcolumns to autocomplete boxes. I can bind the data from a list easy enough outside of a datagrid but I am unable to locate a simple example of how to do it within a datagrid.

I appreciate anyone's input.
Thanks in advance.

code is below

Xaml:

<


UserControl xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk" xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit" x:Class="AccordionAutoCompleteBox.MainPage"

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"

d:DesignHeight="680" d:DesignWidth="1240">

<Grid x:Name="LayoutRoot" Background="White">

<StackPanel VerticalAlignment="Center">

<toolkit:AccordionItem x:Name="AccordionItem2" FontSize="12" Background="LightBlue" BorderBrush="Wheat" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" IsSelected="False" MaxHeight="400">

<sdk:DataGrid Name="AccordionGrid" ItemsSource="{Binding ExpData}" AutoGenerateColumns="False" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" HeadersVisibility="All" BorderThickness="1" Margin="8" SelectionMode="Single" Canvas.ZIndex="-1" MaxHeight="360">

<sdk:DataGrid.Columns>
 <sdk:DataGridTemplateColumn Header="Exp">
 <sdk:DataGridTemplateColumn.CellTemplate>
 <DataTemplate>
 <sdk:AutoCompleteBox x:Name="AutoCompGrid" Text="{Binding  Exp, Mode=TwoWay}" ItemsSource="{Binding Exp}"  IsTextCompletionEnabled="True" />
DataTemplate>
sdk:DataGridTemplateColumn.CellTemplate>
sdk:DataGridTemplateColumn>
<sdk:DataGridTextColumn Header="Exp" Binding="{Binding Exp}" IsReadOnly="False" />
<sdk:DataGridTextColumn Header="Desc" Binding="{Binding Desc}" IsReadOnly="False" />
<sdk:DataGridTextColumn Header="Prod" Binding="{Binding Prod}" IsReadOnly="False" />
<sdk:DataGridTextColumn Header="Source" Binding="{Binding Source}" IsReadOnly="False" />
<sdk:DataGridTextColumn Header="Start" Binding="{Binding Start}" IsReadOnly="False" />
<sdk:DataGridTextColumn Header="Reset" Binding="{Binding Reset}" IsReadOnly="False" />
<sdk:DataGridTextColumn Header="Amt" Binding="{Binding Amt}" IsReadOnly="False" />

sdk:DataGrid.Columns>

sdk:DataGrid>

toolkit:AccordionItem>

<sdk:AutoCompleteBox x:Name="AutoCompGrid2" Text="{Binding Exp}" ItemsSource="{Binding Exp}" IsTextCompletionEnabled="False" />

StackPanel>
Grid>
UserControl>

CodeBehind


namespace AccordionAutoCompleteBox
{
  public partial class MainPage : UserControl
  {
  public MainPage()
  {
  InitializeComponent();
  List myList = new List
  {
  new ExpData
  {Exp = "cell 1",
  Desc = "cell 2",
  Prod = "cell 3",
  Source = "cell 4",
  Start = "cell 5",
  Amt = "cell 6",
  Reset = "cell 7"},
  new ExpData
  {Exp = "cell 8",
  Desc = "cell 9",
  Prod = "cell 10",
  Source = "cell 11",
  Start = "cell 12",
  Amt = "cell 13",
  Reset = "cell 14"}
  };
  AccordionGrid.ItemsSource = myList;
  AutoCompGrid2.ItemsSource = myList;
 
  this.AccordionItem2.Header = " Accordion Header ";
 
  }
  }
  public class ExpData
  {
  public String Exp { get; set; }
  public String Desc { get; set; }
  public String Prod { get; set; }
  public String Source { get; set; }
  public String Start { get; set; }
  public String Reset { get; set; }
  public String Amt { get; set; }
  public ExpData(String exp, string desc, string prod, string source, string start, String reset, String amt)
  {
  Exp = exp;
  Desc = desc;
  Prod = prod;
  Source = source;
  Start = start;
  Reset = reset;
  Amt = amt;
  }
  public override string ToString()
  {
  return Exp;
  }