Eclipse using custom library tag error

Hello, I have the following erro when I execute my index.jsp page on eclipse configured for tomcat
type Rapport d'exception
message
description Le serveur a rencontr� une erreur interne () qui l'a emp�ch� de satisfaire la requ�te.
exception
org.apache.jasper.JasperException: Impossible de compiler la classe pour la JSP:
Une erreur s'est produite � la ligne: 14 dans le fichier jsp: /index.jsp
tagAuthentification cannot be resolved to a type
11: </head>
12: <body>
13:
14: <mt:AuthenTag>
15:      <script type="text/javascript" src="excanvas.js"></script>
16:      <script type="text/javascript" src="json2.js"></script>
17:      <script type="text/javascript">
Une erreur s'est produite � la ligne: 14 dans le fichier jsp: /index.jsp
tagAuthentification cannot be resolved to a type
11: </head>
12: <body>
13:
14: <mt:AuthenTag>
15:      <script type="text/javascript" src="excanvas.js"></script>
16:      <script type="text/javascript" src="json2.js"></script>
17:      <script type="text/javascript">
Une erreur s'est produite � la ligne: 18 dans le fichier jsp: /index.jsp
tagMapTree cannot be resolved to a type
15:      <script type="text/javascript" src="excanvas.js"></script>
16:      <script type="text/javascript" src="json2.js"></script>
17:      <script type="text/javascript">
18:           <mt:mapTree noUsager="${sessionScope.userId}" />
19:      </script>
20:      <script type="text/javascript" src="mindmap.js"></script>
21:     <div style="position: relative" id="mainDiv">
Une erreur s'est produite � la ligne: 18 dans le fichier jsp: /index.jsp
tagMapTree cannot be resolved to a type
15:      <script type="text/javascript" src="excanvas.js"></script>
16:      <script type="text/javascript" src="json2.js"></script>
17:      <script type="text/javascript">
18:           <mt:mapTree noUsager="${sessionScope.userId}" />
19:      </script>
20:      <script type="text/javascript" src="mindmap.js"></script>
21:     <div style="position: relative" id="mainDiv">
Stacktrace:
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:423)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:308)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:273)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)Here is my index.jsp page code
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql"%>
<%@ taglib uri="/WEB-INF/tld/Authentification.tld" prefix="mt"%>
<%@ page isELIgnored="false" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>MindMap - Lab JSP2</title>
</head>
<body>
<mt:AuthenTag>
     <script type="text/javascript" src="excanvas.js"></script>
     <script type="text/javascript" src="json2.js"></script>
     <script type="text/javascript">
          <mt:mapTree noUsager="${sessionScope.userId}" />
     </script>
     <script type="text/javascript" src="mindmap.js"></script>
    <div style="position: relative" id="mainDiv">
    <canvas width="4000" height="4000" id="mindMap"/>
</div>
</mt:AuthenTag>
</body>
</html>Now here my tld xml file
<?xml version = '1.0' encoding = 'windows-1252'?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
    version="2.0">
<display-name>Authentification</display-name>
<tlib-version>1.0</tlib-version>
<short-name>Authentification</short-name>
<uri>MesTags</uri>
<tag>
    <description>Tag qui affiche une fenetre d'authentification</description>
    <name>AuthenTag</name>
    <tag-class>tagAuthentification</tag-class>
    <body-content>scriptless</body-content>
</tag>
    <tag>
    <description>Tag contient les ements necessaire pour construire un arbre</description>
    <name>mapTree</name>
    <tag-class>tagMapTree</tag-class>
    <body-content>tagdependent</body-content>
    <attribute>
      <description>Le numero usage</description>
      <name>noUsager</name>
      <required>true</required>
       <rtexprvalue>true</rtexprvalue>
      <type>int</type>
    </attribute>
</tag>
</taglib>And finally here is a screenshot of my eclipse tree page :
My project screenshot : http://www.membres.lycos.fr/patatesaufour/eclipsePath.JPG
thank you.

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