SQL & PL/SQL

Hellow All,

We have oracle 10g On windows....

i have created a schedular like below

BEGIN
  DBMS_SCHEDULER.create_job (
    job_name        => 'TEST_JOB',
    job_type        => 'PLSQL_BLOCK',
    job_action      => 'BEGIN DDD; END;',
    start_date      => SYSTIMESTAMP,
    repeat_interval => 'freq=MINUTELY; byminute=0; bysecond=0;',
    end_date        => NULL,
    enabled         => TRUE,
    comments        => 'Job defined entirely by the CREATE JOB procedure.');
END;

could you please tell me what is the repeat_interval of above. I have specified MINUTELY but it's not firing after each minute.