ConfirmButtonExtender NOT Working in Gridview Template Field since BETA1

Here is the Code for the Template Field in the Gridview exactly as it is documented:

Am I missing something or just more AJAX BETA woes?

<asp:TemplateFieldShowHeader="False">

<ItemTemplate>

<asp:ImageButtonID="ImageButtonDelete"runat="server"CausesValidation="False"CommandName="Delete"ImageUrl="~/App_Themes/Sameday/Images/DeleteX.gif"/>

<cc3:ConfirmButtonExtenderID="ConfirmButtonExtenderDelete"ConfirmText="Are you sure you want to Delete?"runat="server"TargetControlID="ImageButtonDelete">

</cc3:ConfirmButtonExtender>

</ItemTemplate>

</asp:TemplateField>

Please try this:http://forums.asp.net/thread/1441672.aspx