title: dropbox connector, no callback uri, Could not find connector with name 'connector.http.mule.default'
body: <p>i'm new to Mule and i'm trying to use the dropbox connector with my web application. I'm trying to make a flow to authorize the current user to upload a file, however the flow doesn't even run. All i did was set up an http connector, then placed the dropbox connector and set it up. I used the graphic interface but here is the code:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  
  &lt;http:listener-config name="HTTP_Listener_Configuration" host="localhost" port="8081" doc:name="HTTP Listener Configuration"/&gt;
  &lt;dropbox:config name="Dropbox" appKey="xxxxxxxxxxx" appSecret="xxxxxxxxxxx" doc:name="Dropbox"&gt;
      &lt;dropbox:oauth-callback-config domain="http://localhost" localPort="8081"  path="callback" remotePort="8081"/&gt;
  &lt;/dropbox:config&gt;
  &lt;dropbox:config name="Dropbox1" appKey="xxxxxxxxxxx" appSecret="xxxxxxxxxxx" doc:name="Dropbox"&gt;
      &lt;dropbox:oauth-callback-config domain="http://localhost" localPort="8081" remotePort="8081" path="callback"/&gt;
  &lt;/dropbox:config&gt;
  &lt;flow name="dropbxFlow"&gt;
      &lt;http:listener config-ref="HTTP_Listener_Configuration" path="/callback/" doc:name="HTTP"/&gt;
      &lt;dropbox:authorize config-ref="Dropbox" doc:name="Dropbox"/&gt;
  &lt;/flow&gt;
  </code></pre>
  
  <p></p>
  
  <p>i keep getting this error when i run : 
  INFO  2015-05-05 16:09:53,688 [Mule.app.deployer.monitor.1.thread.1] org.mule.lifecycle.AbstractLifecycleManager: Starting model: _muleSystemModel
  INFO  2015-05-05 16:09:53,688 [Mule.app.deployer.monitor.1.thread.1] org.mule.construct.FlowConstructLifecycleManager: Starting flow: dropbxFlow
  INFO  2015-05-05 16:09:53,688 [Mule.app.deployer.monitor.1.thread.1] org.mule.processor.SedaStageLifecycleManager: Starting service: dropbxFlow.stage1
  ERROR 2015-05-05 16:09:53,694 [Mule.app.deployer.monitor.1.thread.1] org.mule.modules.dropbox.process.DefaultHttpCallback: Could not find connector with name 'connector.http.mule.default'
  INFO  2015-05-05 16:09:53,694 [Mule.app.deployer.monitor.1.thread.1] org.mule.processor.SedaStageLifecycleManager: Stopping service: dropbxFlow.stage1
  ERROR 2015-05-05 16:09:53,890 [Mule.app.deployer.monitor.1.thread.1] org.mule.module.launcher.application.DefaultMuleApplication: null
  org.mule.api.DefaultMuleException: Could not find connector with name 'connector.http.mule.default'</p>
  
  <p>This only happens when i use the Authorize attribute on the dropbox connector, as it needs a callback uri(which i think it the problem here), the callback http endpoint isn't being set up. Any insight would be greatly appreciated.</p>