Form getting submitted even A4j validation fails +jsf

Question

i am using a4j for checking username exists or not for onblur event
it displays the error messages when user already exists but ,if i click on
submit button after displaying the error message it gets submitted
when it comes to the required=true for inputtext it doesn't get submitted
<h:inputText id="firstName" label="#{msg['msg.firstName']}"
                                                        value="#{RegistrationBean.firstName}"                                                        
                                                        required="true" validator="#{RegistrationBean.checkFirstName}">
                                                        <a4j:support event="onblur" reRender="msg" onsubmit="true" oncomplete="true" />                                 
                                                     </h:inputText>
public void checkFirstName(FacesContext facesContext, UIComponent component, Object value) 
          String name = (String) value;
         if(name.trim().length()==0){
              System.out.println("Name *******");
              String message = bundle.getString("Name_Required");
               FacesContext.getCurrentInstance().addMessage("Reg:firstName",
                     new FacesMessage(FacesMessage.SEVERITY_ERROR, message,message));                    
         if(name.trim().equalsIgnoreCase("tom")){
              String message = bundle.getString("Name_exists");
               FacesContext.getCurrentInstance().addMessage("Reg:firstName",
                     new FacesMessage(FacesMessage.SEVERITY_ERROR, message,message));                    
       }could anyone suggest me where i went wrong
thanks

Answer 1

bean is configured as request in faces-config and also tried changing to session