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How do to advice xmpp server of received chat message?

I am development an Android app with real-time chat messaging, to test application use two android terminals, one with my development application and other with Xabber, both connected to same xmpp server.

Next is the question, when I send one message from MYAPP client to XABBER client, I see in Xabber chat one validation received tick, but, when I send one message from XABBER client to MYAPP client, i don’t see this tick on the sended message.

Besides, Allways I send one message from XABBER client, xmpp server send the old first message sended from the past and not ticked…

What’s the problem? ECHO message or any other thing…? How can I do to fix it?

Thank you in advance.