s:action 不起作用是怎么回事

channelVideo.jsp<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>  </head>
  
  <body>
    <s:action name="toEpg" namespace="/com.video.action" executeResult="true" />
    <input type="text" id="mess" value="<%=request.getAttribute("toepg")%>"/>
  </body>
</html>struts.xml<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="default" namespace="/" extends="struts-default"
abstract="false">
<action name="toEpg" class="com..video.action.PlayChannelAction" method="palyChannelVideo">
<result name="play" type="dispatcher">/front/first.jsp</result>
</action>
</package>
</struts>  
为什么在页面上显示不了值啊