title: Xmpp FileTransnfer in Android giving 503-service unavailable Error
body: <p>Now am working with Xmpp file Transfer in Android.While am sending files it give a 503 service unavailable error.</p>
  
  <pre><code>&gt;    07-29 15:33:12.183: D/SMACK(22151): 03:33:12 PM SENT (1095973320):
  &gt; &lt;iq id="s9DTB-10" to="jithu4@jabber.org/Smack"
  &gt; from="jithu1@jabber.org/Smack" type="set"&gt;&lt;si
  &gt; xmlns="http://jabber.org/protocol/si" id="jsi_6388535575928662640"
  &gt; mime-type="image/jpeg"
  &gt; profile="http://jabber.org/protocol/si/profile/file-transfer"&gt;&lt;file
  &gt; xmlns="http://jabber.org/protocol/si/profile/file-transfer"
  &gt; name="IMG_20130715_115622_1445552069.jpg" size="2105955"
  &gt; &gt;&lt;desc&gt;test_file&lt;/desc&gt;&lt;/file&gt;&lt;feature xmlns="http://jabber.org/protocol/feature-neg"&gt;&lt;x
  &gt; xmlns="jabber:x:data" type="form"&gt;&lt;field var="stream-method"
  &gt; type="list-single"&gt;&lt;option&gt;&lt;value&gt;http://jabber.org/protocol/bytestreams&lt;/value&gt;&lt;/option&gt;&lt;option&gt;&lt;value&gt;http://jabber.org/protocol/ibb&lt;/value&gt;&lt;/option&gt;&lt;/field&gt;&lt;/x&gt;&lt;/feature&gt;&lt;/si&gt;&lt;/iq&gt;
  </code></pre>
  
  <p>After that it gives a response like that</p>
  
  <pre><code>&gt; 07-29 15:33:12.708: D/SMACK(22151): 03:33:12 PM RCV  (1095973320): &lt;iq
  &gt; from='jithu4@jabber.org/Smack' to='jithu1@jabber.org/Smack'
  &gt; type='error' id='s9DTB-10'&gt;&lt;error code='503'
  &gt; type='cancel'&gt;&lt;service-unavailable
  &gt; xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/&gt;&lt;/error&gt;&lt;/iq&gt;
  </code></pre>
  
  <p>Am using the <strong>asmack-android-6-0.8.1.1.jar</strong> libs</p>
  
  <p>Please help me ,why this 503 error happens.</p>