Hi I think the problem was due to an old example when trying to build ChallengeResponse object. I've followed the example in: http://wiki.restlet.org/docs_2.0/13-restlet/27-restlet/46-restlet/112-restlet.html
and is working fine now. KR, ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2662370
