GroupByExpression ORM w/ RADGRID

[Adam]

I need to get a total for a column in my grid and it is not working.  I am using ORM with reverse mapping. 

Why is it not working?

I am using the following code in my grid-
     

<telerik:GridTemplateColumn DataField="Items" HeaderText="Items" FooterText="All items: "
                    UniqueName="Items" GroupByExpression="Items Group By Items">
                    <ItemTemplate>
                        <asp:Label ID="lblItems" runat="server" Text='<%#Eval("Items") %>'>
                        </asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <telerik:RadNumericTextBox ID="txtItems" runat="server" Text='<%#Bind("Items") %>'>
                        </telerik:RadNumericTextBox>
                    </EditItemTemplate>
                </telerik:GridTemplateColumn>

[Adam]

Problem solved, I used the ItemDataBound approach documented here-

http://www.telerik.com/help/aspnet-ajax/grdtotalsingridfooters.html