I have an ASP.NET application that is using ASP.NET AJAX. I am using the ASP.NET AJAX Toolkit to present a dialog to a user. When the user clicks 'Yes' in the dialog, I want to handle that event in the code behind. However, I noticed that my click event is not being reached. Here is the main code:\[code\]<aspanel ID="dialogContinuePanel" runat="server" style="display:none;" DefaultButton="yesButton"> <div>Are you sure you want to continue?</div> <div> <asp:ImageButton ID="yesButton" runat="server" AlternateText="Yes" ImageUrl="/resources/yes.png" OnClick="yesButton_Click" /> <asp:ImageButton ID="noButton" runat="server" AlternateText="No" ImageUrl="/resources/no.png" /> </div></aspanel><asp:LinkButton ID="hiddenLinkButton" runat="server" Text="" /><cc1:ModalPopupExtender ID="dialogErrorExtender" runat="server" OkControlID="yesButton" TargetControlID="hiddenLinkButton" PopupControlID="dialogContinuePanel" CancelControlID="noButton" />\[/code\]My Code Behind:\[code\]protected void yesButton_Click(object sender, EventArgs e){ string argument = yesButton.CommandArgument; // Do some processing and redirect the user}\[/code\]How do I handle the click event of a Button that is used with a ModalPopupExtender? What am I doing wrong?