Simple struts example but it doesn't work

Hello everybody,
I'm new in struts technology and I wanted try a simple struts example, but it didn't work. Here are listings of code:
*** struts-config .xml (is located in WEB-INF/) :
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.0//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd">
<struts-config>
<form-beans>
<form-bean name="registerForm" type="app.RegisterForm"/>
</form-beans>
<action-mappings>
<action path="/register"
type="app.RegisterAction"
name="registerForm">
<forward name="success" path="/success.html"/>
<forward name="failure" path="/failure.html"/>
</action>
</action-mappings>
</struts-config>
*** RegisterAction.java (located in WEB-INF/classes/app):
package app;
import org.apache.struts.action.*;
import javax.servlet.http.*;
import java.io.*;
public class RegisterAction extends Action {
     public ActionForward perform(ActionMapping mapping, ActionForm form,
               HttpServletRequest req, HttpServletResponse res) {
          // b Cast the form to the RegisterForm
          RegisterForm rf = (RegisterForm) form;
          String username = rf.getUsername();
          String password1 = rf.getPassword1();
          String password2 = rf.getPassword2();
          // c Apply business logic
          if (password1.equals(password2)) {
               return mapping.findForward("success");
          // E Return ActionForward for failure
          return mapping.findForward("failure");
*** RegisterForm.java (located in WEB-INF/classes/app):
package app;
import org.apache.struts.action.*;
public class RegisterForm extends ActionForm {
protected String username;
protected String password1;
protected String password2;
public String getUsername() {return this.username;};
public String getPassword1() {return this.password1;};
public String getPassword2() {return this.password2;};
public void setUsername(String username) {this.username = username;};
public void setPassword1(String password) {this.password1 = password;};
public void setPassword2(String password) {this.password2 = password;};
*** faulire.html ( located webapps/NAME_APPLICATION/ )
<HTML>
<HEAD>
<TITLE>FAILURE</TITLE>
</HEAD>
<BODY>
Registration failed!
<P>try again?</P>
</BODY>
</HTML>
*** success.html ( located webapps/NAME_APPLICATION/ )
<HTML>
<HEAD>
<TITLE>SUCCESS</TITLE>
</HEAD>
<BODY>
Registration succeeded!
<P>try another?</P>
</BODY>
</HTML>
*** register.jsp ( located webapps/NAME_APPLICATION/ )
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<html:form action="register.do">
UserName:<html:text property="username"/><br>
enter password:<html:password property="password1"/><br>
re-enter password:<html:password property="password2"/><br>
<html:submit value="Register"/>
</html:form>
*** web.xml (located in WEB-INF/)
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>

<servlet>
<servlet-name>action</servlet-name>
<servlet-class>
     org.apache.struts.action.ActionServlet
     </servlet-class>
<init-param>
<param-name>application</param-name>
<param-value>ApplicationResources</param-value>
</init-param>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>validate</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

<taglib>
<taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
</taglib>
</web-app>
After start of NAME_APPLICATION it show register form (register.jsp) but when I fill out all information and submit those information it show empty window in internet browser and in url box is something like this:
http://localhost:8084/StrutsTest/register.do;jsessionid=2304C0A9820E7FCC23106C16564D51A8
where is a problem? Thank you

Employing a descendent of the Action class that does not implement the perform() method while using the Struts 1.0 libraries. Struts 1.1 Action child classes started using execute() rather than perform(), but is backwards compatible and supports the perform() method. However, if you write an Action-descended class for Struts 1.1 with an execute() method and try to run it in Struts 1.0, you will get this "Document contained no data" error message in Netscape or a completely empty (no HTML whatsoever) page rendered in Microsoft Internet Explorer.
Also check this URL http://www.geocities.com/Colosseum/Field/7217/SW/struts/errors.html

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