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I have a page that uses a master page, several RequiredFieldValidators, and the Web Toolkit autocomplete extender. The following code only shows the bare minimum of the page: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" MasterPageFile="~/master.master" Inherits="Login" %> <asp:Content id="Content1" contentplaceholderid="ContentPlaceHolder1" runat="server"> <asp:UpdatePanel ID="pnlUpdate" runat="server"> <ContentTemplate> <div> <asp:ImageButton class="submitButton" imageurl="images/button_submit.gif" id="btnSubmit" runat="server" onclick="btnSubmit_ServerClick"/> </div> </ContentTemplate> </asp:UpdatePanel> </asp:Content> Code-behind: protected void btnSubmit_ServerClick (object sender, ImageClickEventArgs e) { //breakpoint here does not get hit } The <form runat="server"> tag is in the master page. The code above does not fire the onclick event. If I get rid of the master page and add a form tag to the page, it works. Is the form tag in the master page not supported, or is this supposed to work somehow? alt text http://digitalcopy.warnerbros.com/images/mainmenu.gif?provider=00079&disc=03403AAA-1D20-47F2-91FA-5EE632832659

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