Automatic created events; unable to put them on hold

 We are creating automatic events, by directly inserting them into the events table. I am not able to put those events on hold. any ideas??
Here is the code:

PROCEDURE create_events(
    p_exp_rec projordrec)
IS
  l_event_id               NUMBER;
  l_event_type             VARCHAR2(20);
  l_task_org               NUMBER;
  g_user_id                CONSTANT NUMBER := fnd_global.user_id;
  g_login_id               CONSTANT NUMBER := fnd_global.login_id;
  g_program_application_id CONSTANT NUMBER := fnd_global.prog_appl_id;
  g_program_id             CONSTANT NUMBER := fnd_global.conc_program_id;
  l_user_id                NUMBER;
  l_responsibility_id      NUMBER;
  l_return_status          VARCHAR2 (1);