Erreur interne apache message

Bonjours les amis
j'ai besoin de vos aides, mon application web ne tourne plus
et voila mon message d'erreur:
Etat HTTP 500 -

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type Rapport d'exception

message

description Le serveur a rencontré une erreur interne () qui l'a empêché de satisfaire la requête.

exception

javax.servlet.ServletException: /login.jsp(7,0) '#{login.NomUsr}' Property 'NomUsr' not found on type connexion.Login
javax.faces.webapp.FacesServlet.service(FacesServlet.java:277)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)


cause mère

org.apache.jasper.el.JspPropertyNotFoundException: /login.jsp(7,0) '#{login.NomUsr}' Property 'NomUsr' not found on type connexion.Login
org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:104)
javax.faces.component.UIOutput.getValue(UIOutput.java:184)
com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:285)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:154)
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:861)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:937)
javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:266)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:197)
org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)


note La trace complète de la cause mère de cette erreur est disponible dans les fichiers journaux de Apache Tomcat/6.0.14.


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Apache Tomcat/6.0.14

et je vous donne le code du bean:
package connexion;

import java.io.Serializable;
import java.util.List;

import org.springframework.context.support.ClassPathXmlApplicationContext;

//import service.IService;
//import entites.User;
//import service.IService;
import service.Service;
import entites.User;
public class Login implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private String NomUsr=" identifient";
private String Mdp;
private List<User> Liste;
private Service service ;

public Login(){

}

public String getNomUsr() {
return NomUsr;
}

public void setNomUser(String NomUser) {
this.NomUsr = NomUser;
}

public String getMdp() {
return Mdp;
}

public void setMdp(String Mdp) {
this.Mdp = Mdp;
}

public List<User> getListe() {
return Liste;
}

public void setListe(List<User> liste) {
this.Liste = liste;
}

public Service getService() {
return service;
}

public void setService(Service service) {
this.service = service;
}

public String Verif_User(){
service = (Service) new ClassPathXmlApplicationContext("spring.xml").getBean("service");
System.out.format("[User]%n");
for (User p : service.getAll()) {
if( (p.getIdUser()).equals(NomUsr)){
if(p.getMdpUer().equals(Mdp)){
System.out.println("coooooooool "+p.getIdUser()+" "+ p.getMdpUer());
return("success");
}
else{
System.out.println("mdp incorrect");
return("bad-address");
}
}
}
return("bad-address");
}

}
et le code du page:
<%@ page language="java" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<f:view>
<h:form>
Email address:
<h:inputText value="#{login.NomUsr}"/><BR>
Password:
<h:inputSecret value="#{login.Mdp}"/><BR>
<h:commandButton value="Sign Me Up!"
action="#{Login.Verif_User}"/>
</h:form>
</f:view>
Aidez moi à trouver le problème SVP :cry::cry::cry: