Utilização newsfeed - The value for the useBean class attribute com.wrox.begjsp.ch2.NewsFeed is inv

Estou com um problema, esta dando este erro conforme informado no log..

he value for the useBean class attribute com.wrox.begjsp.ch2.NewsFeed is invalid.

<%-- 
    Document   : news
    Created on : 31/01/2008, 16:41:40
    Author     : ti_gilcimar
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
    <head>
        <link rel=stylesheet type="text/css" href="resources/portal.css">
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Weather Portal</title>
    </head>
    <body>
        <table class="mainBox" width="600">
            <tr>
                <td class="boxTitle">
                    You Get the Latest Weather!
                </td>
            </tr>
            <tr>
                <td>
                    <span class="headline">
                        <jsp:useBean id="newsfeed" class="com.wrox.begjsp.ch2.NewsFeed" scope="request">
                            <jsp:setProperty name="newsfeed" property="topic" value="weather"/>
                        </jsp:useBean>
                        <table>
                            <c:forEach items="${newsfeed.values}" var="row">
                                <tr>
                                    <td class="tableCell" width="200"> ${row.city}</td>
                                    <td>${row.temp}</td>
                                </tr>
                            </c:forEach>
                        </table>
                        
                    </span>
                </td>
            </tr>
        </table>
    </body>
</html>

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