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ConfirmButtonExtender and ModalPopupExtender Server Control with Master Page Failed to find element

Posted By:      Posted Date: September 24, 2010    Points: 0   Category :ASP.Net

I am in the process of building a server control that contains a ConfirmButtonExtender. This is my code:

The Master Page:

<%@ Master Language="VB" CodeFile="MasterPage.master.vb" Inherits="CBC_MasterPage" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <asp:ContentPlaceHolder id="head" runat="server">
    <form id="form1" runat="server">
        <asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">

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