this is a common question every one asks. please follow this mailing thread http://marc.theaimsgroup.com/?l=axis-user&m=117209253914286&w=2 here ajith have clearly explained how to debug and the problem for the issue. I think this is your case as well. if not please send us your wsdl and the response message.
-- Amila Suriarachchi, WSO2 Inc.
