Get refreanceData on error in OnSubmit in spring MVC 2.5

Get refreanceData on error in OnSubmit in spring MVC 2.5

I'm new to spring MVC and using Spring MVC 2.5 and SimpleFormController
every thing is working fine the only issue is that i have to validate some
values in OnSubmit so i do that like
if (value == null) {
request.setAttribute("schedulemeeting", meeting);
return new ModelAndView("schedulemeeting", "error",
responseParser.getErrorMessage());
}
SO this load the form and displays the error but i'm not getting the
referenceData which is set. So my form's drop-down list become empty on
error.
What need to be done to make it work