How can I use SAX to Read XML in JSP?

I created a class which extend DefaultHandler of SAX. I can use java to call this class and read XML data without any problems. But I can't call this class through JSP. Looks it didn't active startElement() when I called from JSP. Do you have any ideas on this case?
======================This is java call and works==============
import java.io.*;
import java.util.*;
import ReadXmlSax;
public class ReadElement
     public static void main(String argv[])
          ReadXmlSax r = new ReadXmlSax();
          Enumeration e = r.getAttribute("dre.xml","server","name");
          try{
               while (e.hasMoreElements()) {
               System.out.println((String)e.nextElement());}
          }catch(Throwable t){
               t.printStackTrace();
======================================================================
========================This is jsp call but doesn't work=============
<%@ page import = "java.util.*" %>
<%@ page import = "java.io.*" %>
<%@ page import = "ReadXmlSax" %>
<html>
<head><title>SAX Reader</title></head>
<body>
<%
ReadXmlSax r = new ReadXmlSax();
Enumeration e = r.getAttribute("dre.xml","server","name");
while (e.hasMoreElements()) {
out.println(e.nextElement());
out.println("<br>");
%>
</body>
</html>
======================================================================

maybe you just simply can't reach dre.xml from your web server!

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