Bind main/access classes to JNDI

Hi All,
   
  I am trying to use indirect JNDI for my web app in websphere application server.
   
  I followed the following doc and created OjbPbstartup class as explained.
   
  http://db.apache.org/ojb/docu/guides/deployment.html#bind-to-jndi
   
  When I try to access the getObjectByQuery function, I get the following error. Can any one help? Please....
   
  [Servlet Error]-[com/mydir/pkg/OjbPbStartup incompatible with javax/sql/DataSource]: java.lang.ClassCastException: com/mydir/pkg/OjbPbStartup incompatible with javax/sql/DataSource
  at java.lang.Throwable.<init>(Throwable.java)
  at java.lang.Throwable.<init>(Throwable.java)
  at java.lang.ClassCastException.<init>(ClassCastException.java:53)
  at org.apache.ojb.broker.accesslayer.ConnectionFactoryAbstractImpl.newConnectionFromDataSource(Unknown Source)
  at org.apache.ojb.broker.accesslayer.ConnectionFactoryAbstractImpl.lookupConnection(Unknown Source)
  at org.apache.ojb.broker.accesslayer.ConnectionFactoryManagedImpl.lookupConnection(Unknown Source)
  at org.apache.ojb.broker.accesslayer.ConnectionManagerImpl.getConnection(Unknown Source)
  at org.apache.ojb.broker.accesslayer.StatementManager.getPreparedStatement(Unknown Source)
  at org.apache.ojb.broker.accesslayer.JdbcAccessImpl.executeQuery(Unknown Source)
  at org.apache.ojb.broker.accesslayer.RsQueryObject.performQuery(Unknown Source)
  at org.apache.ojb.broker.accesslayer.RsIterator.<init>(Unknown Source)
  at org.apache.ojb.broker.core.RsIteratorFactoryImpl.createRsIterator(Unknown Source)
  at org.apache.ojb.broker.core.PersistenceBrokerImpl.getRsIteratorFromQuery(Unknown Source)
  at org.apache.ojb.broker.core.PersistenceBrokerImpl.getIteratorFromQuery(Unknown Source)
  at org.apache.ojb.broker.core.PersistenceBrokerImpl.getObjectByQuery(Unknown Source)
  at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unknown Source)
  at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unknown Source)
  at com.mydir.pkg.dao.tmpDAO.findByPK(tmpDAO.java)
  at com.mydir.pkg.actions.UserLoginAction.execute(UserLoginAction.java:136)
  at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
  at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
  at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
  at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
  at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
  at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
  at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
  at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
  at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
  at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:61)
  at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:974)
  at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:564)
  at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:200)
  at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:119)
  at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:276)
  at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
  at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:182)
  at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
  at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
  at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:618)
  at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:439)
  at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java)

 
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