spring 4 not validate

@RequestMapping(value="/app/home/refernece",method=RequestMethod.POST)
 public String processReference(HttpServletRequest request, @ModelAttribute("refernceForm") @Validated @Valid ReferenceForm referenceForm, BindingResult bindingResult, Model model){

     if(!bindingResult.hasErrors()){
         boolean emailExists = customerservice.customerWithEmailExists(referenceForm.getRefernceMail());
         if (!emailExists) {
            bindingResult.rejectValue("refernceMail", "registrationform.valid.email.exists");
        }            

     }
     System.out.print(referenceForm.getRefernceName());
     if (bindingResult.hasErrors()) {
        //logger.log(Level.DEBUG, "Form Errors.");
        //model.addAttribute("BindingResult",bindingResult);
        //model.addAttribute("refernceForm", new ReferenceForm());
    return "view/app/refernce";
    }
     return "redirect:/home/systemschein";

 }

• This my handler method.


• I add 2 validator to this controller but its not validating?