OA page error: Extending a region

When I try to extend my pageLayout region using a shared region, I run into an error at the time of rendering the page. It says it could not find and load the AMImpl Class. I checked that it is indeed present at the location. The error is:
Exception Details.
oracle.apps.fnd.framework.OAException: Could not load application module 'oracle.apps.ego.extfwk.admin.server.EgoAssocsAM'. at oracle.apps.fnd.framework.webui.OAJSPApplicationRegistry.registerApplicationModule(OAJSPApplicationRegistry.java:279) at oracle.apps.fnd.framework.webui.OAJSPApplicationRegistry.registerApplicationModule(OAJSPApplicationRegistry.java:78) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1279) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:532) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:420) at OA.jspService(_OA.java:71) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370) at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453) at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111) at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260) at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:239) at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:34) at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:880) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303) at java.lang.Thread.run(Thread.java:595)
## Detail 0 ## JBO-30003: The application pool (ap619sdb.us.oracle.commz121dv120105oracle.apps.ego.extfwk.admin.server.EgoAssocsAM) failed to checkout an application module due to the following exception: oracle.jbo.JboException: JBO-29000: Unexpected exception caught: oracle.jbo.JboException, msg=JBO-29000: Unexpected exception caught: oracle.jbo.CustomClassNotFoundException, msg=JBO-26022: Could not find and load the custom class
oracle.apps.ego.extfwk.admin.server.EgoAssocsAMImpl at oracle.jbo.common.ampool.ApplicationPoolImpl.doCheckout(ApplicationPoolImpl.java:2002) at oracle.jbo.common.ampool.ApplicationPoolImpl.useApplicationModule(ApplicationPoolImpl.java:2793) at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:453) at oracle.jbo.http.HttpSessionCookieImpl.useApplicationModule(HttpSessionCookieImpl.java:233) at oracle.apps.fnd.framework.webui.OAHttpSessionCookieImpl.useApplicationModule(OAHttpSessionCookieImpl.java:508) at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:424) at oracle.apps.fnd.framework.webui.OAJSPApplicationRegistry.registerApplicationModule(OAJSPApplicationRegistry.java:208) at oracle.apps.fnd.framework.webui.OAJSPApplicationRegistry.registerApplicationModule(OAJSPApplicationRegistry.java:78) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1279) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:532) at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:420) at OA.jspService(_OA.java:71) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370) at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453) at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111) at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260) at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:239) at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:34) at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:880) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303) at java.lang.Thread.run(Thread.java:595)
## Detail 0 ## oracle.classloader.util.AnnotatedClassNotFoundException:
Missing class: oracle.apps.ego.extfwk.admin.server.EgoAssocsAMImpl Dependent class: oracle.jbo.common.java2.JDK2ClassLoader Loader: default.root:0.0.0 Code-Source: /rh2.1AS/nfs/group/jdevbin/NT/120_rup3dbg_6077669/BC4J/lib/adfm.jar Configuration: <library> in /home/viveksha/jdevhome/120rup3dbg/system/oracle.j2ee.10.1.3.41.57/embedded-oc4j/config/application.xml
This load was initiated at current-workspace-app.web.APPS_HTML:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.
Please let me know why this error is coming. I am trying to run my page using embedded OC4J server in the linux session. What do i need to do when I wish to extend or include a region in my page.
Thanks,
Vivek

"default.root:0.0.0 Code-Source: /rh2.1AS/nfs/group/jdevbin/NT/120_rup3dbg_6077669/BC4J/lib/adfm.jar Configuration: <library> in"
The above log details says that your Jdev patch is 6077669 which is not any publicly available OAF compatible Jdev patch I am aware of. Secondly its referencing to adfm.jar which I presume is related to ADF and hence my doubt.
--Shiv                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

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