How to interpret the class tag in tld file( in jdeveloper)

Hi,
I am getting the following error in one of my sample jsp program :
Error(23): Unable to instantiate tag: my:findBook (class: jsp2.examples.simpletag.FindBookSimpleTag) Make sure that the tag class is available and that the tag library containing the class is not excluded from this application.
Error(23): Unable to find class for bean: null defined by tag with class: jsp2.examples.simpletag.FindBookSimpleTag
when it runs the following line :
<%@ taglib prefix="my" uri="/WEB-INF/jsp2/jsp2-example-taglib.tld" %>
actually jsp2-example-taglib.tld contains the following code :
<tag>
     <description>Populates the page context with a BookBean</description>
<name>findBook</name>
     <tag-class>jsp2.examples.simpletag.FindBookSimpleTag</tag-class>
     <body-content>empty</body-content>
     <attribute>
     <name>var</name>
     <required>true</required>
     <rtexprvalue>true</rtexprvalue>
     </attribute>
</tag>
I do not understand the meaning of jsp2.examples.simpletag.FindBookSimpleTag.
can anyone explain this to me ?
Thanks in Advance !!!
BR
Anurag

Hi,
Thanks !!
How did you find that it is j2ee 1.4 ?
can you comment why I am not able to see the data in the form . The following is thecomplete jsp file code :
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page contentType="text/html;charset=windows-1252"
errorPage="/general_error_page.jsp"%>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib prefix="my" uri="/WEB-INF/jsp2/jsp2-example-taglib.tld" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252"/>
<title>JSP 2.0 Examples</title>
</head>
<body>
<h1>JSP 2.0 Examples - Book SimpleTag Handler</h1>
<hr>
<p>Illustrates a semi-realistic use of SimpleTag and the Expression
Language. First, a &lt;my:findBook&gt; tag is invoked to populate
the page context with a BookBean. Then, the books fields are printed
in all caps.</p>
<br>
<b><u>Result:</u></b><br>
<my:findBook var="book"/>
<table border="1">
<thead>
     <td><b>Field</b></td>
     <td><b>Value</b></td>
     <td><b>Capitalized</b></td>
     </thead>
     <tr>
     <td>Title</td>
     <td>${book.title}</td>
     <td>${my:caps(book.title)}</td>
     </tr>
</table>
</body>
</html>
BR
Anurag

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