While implementing xmpp chat in ios app, it did not recieve message from other end while message sent succesfully?

I have implemented xmpp chat in ios app, connection get established, get authenticated, message succe开发者_Go百科ssfully sent but it not recieving message from other end??

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You must send a presence stanza, either without a priority subelement (which means priority 0), or with a priority element that is 0 or higher, in order to receive messages:

<presence>
  <priority>10</priority>
</presence>