How to retrieve an IQ response

I am trying to automate some xmpp server tests. I send a xml stanza to xmpp server and verify the response. I can successfully send the stanza but I am having trouble retrieving the response.

I am using Smack 4.1.8 api.

This is the stanza that I am sending:

<iq id='123' from='rmorgan@xmppserver.domain.net' to='sandbox@xmppserver.domain.net/resource' type='get'>
<control xmlns='http://domain.com/powertalk/control/2.0'>
<point id='00000000/relay_1A'/>
<point id='00000000/relay_2A'/>
</control>
</iq>

When I send this using PSI client I get the following in return:

<iq from="sandbox@xmppserver.domain/resource" type="result" to="rmorgan@xmppserver.domain/resource" id="17">
<control xmlns="http://domain.com/powertalk/control/2.0">
<point val="0" id="00000000/relay_1A" ts="2016-08-30T15:52:41.068308Z"/>
<point val="0" id="00000000/relay_2A" ts="2016-08-30T15:52:41.148337Z"/>
</control>
</iq>

That is what I want to retrieve.

What I actually receive is:

<iq to='rmorgan@xmppserver.domain.net/resource' from='rmorgan@xmppserver.domain.net' id='c8QbM-8' type='result'>
<query xmlns='jabber:iq:roster'></query>
</iq>

Here is my code. I think I have to do some sort of custom IQ provider but the examples I'm finding are mostly for Smack 3.x and are not valid.

   AbstractXMPPConnection mConnection =this.getConnection();
   try
   {
   final IQ iq =new IQ("control","http://domain.com/powertalk/control/2.0")
   {
   @Override
   protectedIQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml)
   {
  xml.rightAngleBracket();
  xml.halfOpenElement("point");
  xml.attribute("id","00000000/relay_1A");
  xml.append(" />");
  xml.halfOpenElement("point");
  xml.attribute("id","00000000/relay_2A");
  xml.append(" />");

   return xml;
   }
   };
  iq.setStanzaId("123");
  iq.setFrom("rmorgan@xmppserver.domain.net");
  iq.setType(IQ.Type.get);
  iq.setTo("sandbox@xmppserver.domain.net/resource");
  mConnection.sendStanza(iq);

   // Receive the packet
  IQ iqReceived =(IQ)collector.nextResult(50000);

   // Stop queuing results
  collector.cancel();

   System.out.println("Sent: "+ iq.toXML());
   System.out.println("Received: "+ iqReceived.toXML());
   System.out.println("Collector size = "+ collector.getCollectedCount());//returns 0
   System.out.println("collector pollResult = "+ collector.pollResult());//returns null
   System.out.println("collector StanzaFilter = "+ collector.getStanzaFilter());//returns: StanzaIdFilter: id=123
   }
   catch(Exception e)
   {
  e.printStackTrace();
   }

   }

can someone tell me what I am missing here?