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>