taglib directive for "bean" does not exist or Tld is not found是什么原因？

我的文件如下：
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
 
<html:html>
 <head>
 <title><bean:message key="global.title"/></title>
 <html:base/>
 <script language=javascript src="include/scripts.js"></script>
 <link rel="stylesheet" href="stylesheets/format_win_nav_main.css" type="text/css">
 </head>
 
 <body topmargin="0" leftmargin="0" bgcolor="#FFFFFF">
 
 <!-- Header information -->
 <%@ include file="include/head.inc"%>
 
 <!-- Menu bar -->
 <%@ include file="include/menubar.inc"%>
 
 <!--- Include the special offer -->
 <%@ include file="include/mainoffer.inc"%>
 
 <!-- Featured items header row -->
 <table width="645" cellpadding="0" cellspacing="0" border="0">
  <tr>   
   <td width="21">
   <html:img height="1" alt="" page="/images/spacer.gif" width="1" border="0"/>
   </td>
   <td width="534">
   <html:img page="/images/week_picks.gif" altKey="label.featuredproducts"/>
   </td>
   <td width="1" bgcolor="#9E9EFF">
   <html:img height="1" alt="" page="/images/spacer.gif" width="1" border="0"/>
   </td>
   <td width="1"  bgcolor="#9E9EFF">
   <html:img height="1" alt="" page="/images/spacer.gif" width="1" border="0"/>
   </td>
   <td width="90" bgcolor="#9E9EFF" align="right">
   <html:img height="1" alt="" page="/images/spacer.gif" width="90" border="0"/>
   </td>
  </tr>
  <tr>
   <td>
   <html:img height="1" alt="" page="/images/spacer.gif" width="21" border="0"/>
   </td>
   <td colspan="4" bgcolor="#9E9EFF">
   <html:img height="1" alt="" page="/images/spacer.gif" width="1" border="0"/>
   </td>
  </tr>
 </table>
 
 <html:img height="10" alt="" page="/images/spacer.gif" width="1" border="0"/><br>
 
 <!--- Include the featured items -->
 <%@ include file="include/featureditems.inc"%>
 
 <!--- Include the copyright statement -->
 <%@ include file="include/copyright.inc"%>
 </body>
</html:html>