[jdev] ejabbered 1.1.3 doesn't support Flexible Offline Message Retrieval?

[Tran Thai Son]

Hi all,
Did anybody use ejabberd as a server to develop a client?
I created two simple client (using gloox library) A and B, in which A sent
offline messages to B.
But when B logged-in, all messages were pushed to B automatically at the
beginning.
Further more, the client's function for checking "Offline message
retrieval" protocol said that the server does not support.
Does anybody have any idea about this?
Thanks alot,
Son