Problems accessing Objects created by JSF

I have a JSF page:
<h:form id="LoginForm">
          <tr><td><h:outputText value="#{msg.username}"/></td>
               <td><h:inputText id="username" value="#{userBean.username}" validator="#{loginValidator.validateUsername}" required="true"/></td></tr>
          <tr><td><h:outputText value="#{msg.password}"/></td>
               <td><h:inputSecret id="password" value="#{userBean.password}" validator="#{loginValidator.validatePassword}" required="true"/></td></tr>
          <tr><td><h:commandButton action="login" value="#{msg.signOn}"/></td>
               <td><a href="registerAccount.jsf" class="header"><h:outputText value="#{msg.createAccount}"/></a></td></tr>
</h:form>Which binds the entered data to my bean, but how do i access that very same bean in my validator? (i later want to update the data in the bean from a database call)
my validator:
public void validateUsername(FacesContext facesContext, UIComponent uIComponent, Object object) throws ValidatorException{
System.out.println("Validate Username.");
String username = (String)object;
UserBean ub = (UserBean) uIComponent.getAttributes().get("userBean");
    if(ub == null)
     ub = (UserBean)FacesContext.getCurrentInstance().getExternalContext().getApplicationMap().get("userBean");
        if(ub == null)
          ub = (UserBean)FacesContext.getCurrentInstance().getExternalContext().getSessionMap().get("userBean");
if(ub == null)
    System.out.println("userBean = null");Never seems to get the reference :(

Thanks for trying to help!
My JSF:
<h:form id="LoginForm">
     <tr><td><h:outputText value="#{msg.username}"/></td>
          <td><h:inputText id="username" value="#{userBean.username}" validator="#{loginValidator.validateUsername}" required="true"/></td></tr>
     <tr><td><h:outputText value="#{msg.password}"/></td>
          <td><h:inputSecret id="password" value="#{userBean.password}" validator="#{loginValidator.validatePassword}" required="true"/></td></tr>
     <tr><td><h:commandButton action="login" value="#{msg.signOn}"/></td>
          <td><a href="registerAccount.jsf" class="header"><h:outputText value="#{msg.createAccount}"/></a></td></tr>
</h:form>there I use it right? :S
Then in my validator i try to access the bean and get a NullPointer.
If you can plese help I have been struggeling with this for 10 hours now :(

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[Fwd: Security problem accessing MBeanServer from a servlet]

Reposting to Security and Servlet newsgroups.
-------- Original Message --------
Subject: Security problem accessing MBeanServer from a servlet
Date: 10 Feb 2004 13:02:09 -0800
From: Alain <[email protected]>
Reply-To: Alain <[email protected]>
Organization: BEA NEWS SITE
Newsgroups: weblogic.developer.interest.management
Hi,
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PaulF <paulf@reply_in_newsgroup.com> wrote:
On 10 Feb 2004 13:02:09 -0800, Alain <[email protected]> wrote:
Hi,
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Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
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