Integrate Webcenter Announcement service in Oracle Adf

Hiii..
I am trying to integrate Webcenter Announcement service in my oracle adf application.
I followed all the steps as written in oracle documents, but still I am getting following error.
Plzz
http://127.0.0.1:7101/WebCenterDiscussions-ViewController-context-root/faces/main
<MetadataResourceXmlImpl><parseBeans> ADFc: /META-INF/adfc-config.xml:
<MetadataResourceXmlImpl><parseBeans> ADFc: Duplicate managed bean definition for 'task_flow_action_bean' detected.
<BackingActions><doInitializeMainView> failure to authenticate the user john, due to: Unable to connect to discussion server.
oracle.webcenter.collab.share.LoginFailedException: failure to authenticate the user john, due to: Unable to connect to discussion server.
     at oracle.webcenter.collab.forum.internal.jive.JiveForumSession.login(JiveForumSession.java:155)
     at oracle.webcenter.collab.share.Session$1.call(Session.java:353)
     at oracle.webcenter.collab.share.Session$1.call(Session.java:347)
     at oracle.webcenter.concurrent.Submission$2.run(Submission.java:406)..........................
any suggestions plz.

You'll need configure some security pre-requisites to access Announcement in your custom application.
The documentation:
http://download.oracle.com/docs/cd/E14571_01/webcenter.1111/e12405/wcadm_ann_disc.htm#CIHHICII
When you finish this, discussions server will trust in your application to log in the users.
[]'s

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******Code Snippet #1**************************
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Integrate Webcenter Announcement service in Oracle Adf

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