Why buttons save,cancel and back in trigger tag of update panel not working?

Hi all , 
           When i click on save ,cancel and back button in trigger tag they are not working ,please help me to solve this problem:-
Here is code design code:-
<%@ Page Title="" Language="C#" MasterPageFile="~/Userwebpages.master" AutoEventWireup="true" CodeFile="User.aspx.cs" Inherits="Super_admin_User" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %> <asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolderinNestedhead" Runat="Server">
<script type="text/javascript" src="../javascript/Usercontroljs.js"> </script> <link id="Link2" href="../css/Usercontrol.css" rel="stylesheet" type="text/css" runat="server&quo ...