Web Service HttpSessionListener

Witam

Próbuje dodać listener sesji dla mojej usługi sieciowej pod Tomcat'em:

package ws;

import javax.servlet.http.HttpSessionListener;
import javax.servlet.http.HttpSessionEvent;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;


class SessionListener implements  HttpSessionListener {
		public void sessionCreated(HttpSessionEvent se) {
			try {
				log("utworzono sesje: "+se.getSession().getId());
			}catch(IOException e) {
			}

		}
		public void sessionDestroyed(HttpSessionEvent se) {
			try {
				log("zakończono sesje: "+se.getSession().getId());
			}catch(IOException e) {
			}
		}
		private void log(String text) throws IOException {
			BufferedWriter writer = new BufferedWriter(new FileWriter("c:\\log\\session.log",true));
			writer.append(text+"\n");
			writer.flush();
			writer.close();
		}
}

Niestety gdy dodaje listener do web.xml:

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee">
	<display-name>XWS Secure Hello</display-name>
	<description>Secured Hello</description>

	<listener>
		<listener-class>com.sun.xml.ws.transport.http.servlet.WSServletContextListener</listener-class>
	</listener>

	<listener>
		<listener-class>ws.SessionListener</listener-class>
	</listener>

	<servlet>
		<servlet-name>XWSHello</servlet-name>
		<display-name>>XWS Secure Hello</display-name>
		<description>Secured Hello</description>
		<servlet-class>com.sun.xml.ws.transport.http.servlet.WSServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>XWSHello</servlet-name>
		<url-pattern>/shello</url-pattern>
	</servlet-mapping>

	<session-config>
		<session-timeout>60</session-timeout>
	</session-config>

</web-app>

Wyskakuje mi błąd: Error listenerStart.

Sesje obługuje zgodnie z przykładem:
http://weblogs.java.net/blog/ramapulavarthi/archive/2006/06/maintaining_ses.html

Aaaaaaaaa nie dałem public!! hahaaha