Os campos estão retornando nulos

Estrou fazendo uma aplicação com o struts.
Inicia tudo normal, tenho uma tela que me indica usuario e senha, tenho no form uma regra que não deixa os campos serem vazios, quando eu mando enviar o resultado simplesmente me retorna um valor nullo para os dois campos.

codigo do index.


<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %> 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <center>
            <title>Chat Alegria</title>
        </center>
    </head>
    <body>
        <center>
            <br><br><br><br><br><br>
        <html:form action="enviaDados">
            <table border="0">
                <thead>
                    <tr>
                        <th colspan="0"><bean:message key="enviaDados.texto"/></th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td><bean:message key="enviaDados.nome"/></td>
                        <td><html:text property="nome" /></td>
                    </tr>
                    <tr>
                        <td><bean:message key="enviaDados.senha"/></td>
                        <td><html:password property="senha" /></td>            
                    </tr>
                        <td colspan="0"><html:submit value="Enviar" /></td>
                        <td colspan="0"><html:reset  value="Limpar" /></td>
                    </tr>
                </tbody>
            </table>
        </html:form>
        </center>

        <html:errors />

        <br><br><br><br><br><br><br><br><br>

        <center>Se ainda não é Cadastrado clique 
            <a href="./Cadastro.jsp"> 
                <input type="Submit" value="CADASTRAR"> 
            </a>
        </center>
    </body>
</html>

Codigo do actioform


/*
 * AcaoFormBasico.java
 *
 * Created on 6 de Novembro de 2007, 11:57
 */

package br.com.integrator.action;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

/**
 *
 * @author Administrador
 * @version
 */

public class AcaoFormBasico extends ActionForm {
    
        public AcaoFormBasico() {
        super();
    }
        
    private String nome;
    
    private String senha;
    
    /**
     * @return
     */
    public String getNome() {
        return nome;
    }
    
    /**
     * @param string
     */
    public void setNome(String nome) {
        nome = nome;
    }
    
    /**
     * @return
     */
    public String getSenha() {
        return senha;
    }
    
    /**
     * @param senha
     */
    public void setSenha(String senha) {
        senha = senha;
    }
        
    public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
        
        ActionErrors errors = new ActionErrors();
        
        if (getNome() == null || getNome().length() < 1) {
            errors.add("nome", new ActionMessage("error.nome.requerido"));
        }
        
        if (getSenha() == null || getSenha().length() < 1) {
            errors.add("senha", new ActionMessage("error.senha.requerido"));
        }
        
        return errors;
        
    }
}

codigo da action


/*
 * AcaoComStruts.java
 *
 * Created on 6 de Novembro de 2007, 12:44
 */

package br.com.integrator.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
/**
 *
 * @author Administrador
 * @version
 */

public class AcaoComStruts extends Action {
    
    private final static String SUCCESS = "sucesso";

    public ActionForward execute(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        
        return mapping.findForward(SUCCESS);
        
    }
}

Codigo do Struts-config.xml


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

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">


<struts-config>
    <form-beans>
        <form-bean name="AcaoFormBasico" type="br.com.integrator.action.AcaoFormBasico"/>
        <form-bean name="CadastroForm" type="br.com.integrator.actionform.CadastroForm"/>
    </form-beans>
    
    <global-exceptions>
    
    </global-exceptions>

    <global-forwards>
        <forward name="welcome"  path="/Welcome.do"/>
    </global-forwards>

    <action-mappings>
        
        <action input="/index.jsp" 
                name="AcaoFormBasico"
                path="/enviaDados" 
                scope="request"
                type="br.com.integrator.action.AcaoComStruts">
            <forward name="sucesso" path="/dadosEnvSucesso.jsp"/>
            <forward name="sucesso" path="/Mensagens.jsp"/>  
        </action> 
        
        <action path="/Welcome" forward="/welcomeStruts.jsp"/>
       
    </action-mappings>
    
    <controller processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>

    <message-resources parameter="br/com/integrator/action/AplicationResource"/>    
    
    <!-- ========================= Tiles plugin ===============================-->
    <!--
    This plugin initialize Tiles definition factory. This later can takes some
    parameters explained here after. The plugin first read parameters from
    web.xml, thenoverload them with parameters defined here. All parameters
    are optional.
    The plugin should be declared in each struts-config file.
    - definitions-config: (optional)
    Specify configuration file names. There can be several comma
    separated file names (default: ?? )
    - moduleAware: (optional - struts1.1)
    Specify if the Tiles definition factory is module aware. If true
    (default), there will be one factory for each Struts module.
    If false, there will be one common factory for all module. In this
    later case, it is still needed to declare one plugin per module.
    The factory will be initialized with parameters found in the first
    initialized plugin (generally the one associated with the default
    module).
    true : One factory per module. (default)
    false : one single shared factory for all modules
    - definitions-parser-validate: (optional)
    Specify if xml parser should validate the Tiles configuration file.
    true : validate. DTD should be specified in file header (default)
    false : no validation

    Paths found in Tiles definitions are relative to the main context.
    -->
    <plug-in className="org.apache.struts.tiles.TilesPlugin" >
        <set-property property="definitions-config" value="/WEB-INF/tiles-defs.xml" />      
        <set-property property="moduleAware" value="true" />
    </plug-in>
    
    <!-- ========================= Validator plugin ================================= -->
    <plug-in className="org.apache.struts.validator.ValidatorPlugIn">
        <set-property
        property="pathnames"
        value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
    </plug-in>
  
</struts-config>

Bom, quem puder me ajudar eu agradeço.

Onde está dando nullpointerexception?

:pensativo: