offline_message_hook: does not get called when one sends an offline message

I am developing, chat application for android using ejabberd as XMPP server. I want to send GCM push notification, when user is offline. For that I am creating new module in ejabberd, registerd offline_message_hook, but this function gets called only when somebody starts typing and finishes typing. Below are the only packets passed to this hook. Although, user receive message when he/she comes online.

Packet: {xmlelement,
      "message",
      [{"type",
       "chat"},
      {"id",
       "purple7d4d0773"},
      {"to",
       "xxx@rakshith"}],
      [{xmlelement,
       "paused",
       [{"xmlns",
         "http://jabber.org/protocol/chatstates"}],
       []}]}
Packet: {xmlelement,
      "message",
      [{"type",
       "chat"},
      {"id",
       "purple7d4d0773"},
      {"to",
       "xxx@rakshith"}],
      [{xmlelement,
       "composing",
       [{"xmlns",
         "http://jabber.org/protocol/chatstates"}],
       []}]}