Java API not working after upgrading to Integrity 10.9

Hi all,

we have just upgraded integrity to 10.9 from 10.6 and surprisingly java API is not working.

I am using same mksapi.jar to connect to integrity which I used it on 10.6, is this problem?

or I am using wrong minor and major version number for upgraded system@? below is sample code which fails and gives error :

     Error  :com.mks.api.response.APIConnectionException: Failed to establish a session: Session not authenticated/authorized.

My credentials are correct and using which I can log in through integrity Client GUI.

Code :

public void test_9009()
  {
  Session session = null;


  try
  {


  String itemID = "1234";

  IntegrationPoint ip = IntegrationPointFactory.getInstance().createIntegrationPoint("integritytst.myorg.com", 9009, true, 4, 12);
  session = ip.createSession("USERNAME_HERE", "PASSWORD_HERE");
  CmdRunner cmdRunner = session.createCmdRunner();
  Command cmd = new Command(Command.IM, "viewissue");
  cmd.addSelection(itemID);
  //printCommand(cmd);


  Response response = cmdRunner.execute(cmd);

  WorkItemIterator wit = response.getWorkItems();


  while (wit.hasNext())
  {
  System.out.println("****************************WorkItem********************************");
  WorkItem wi = wit.next();
  Iterator fit = wi.getFields();
  while (fit.hasNext())
  {
  Field field = (Field) fit.next();
  System.out.println("\t" + field.getName() + " --------->  " + field.getValueAsString() + "   DataType: " + field.getDataType());
  }


  }


  session.release();


  } catch (APIException | IOException e)
  {
  e.printStackTrace();
  System.err.println("Error  :" + e.getMessage());
  }
  finally
  {


  try
  {
  if (session != null)
  {
  System.err.println("Closing session............................");
  session.release();
  }
  } catch (IOException | APIException e)
  {
  System.err.println("unable to close session");
  }


  }


  }