invalid parameter signature on procedure call

  Explanation:  (DSRI Users) The unique identifier  generated  for
  the  procedures message BLR string does not match what is stored
  in the database.  (SQL users) The user interface to the database
  object  being  called  by  the  application  has changed, or the
  created  routine  is  different  from  the  previously  declared
  forward reference.

  User Action:  Ensure that the routine parameters  are  identical
  in  number, order, type and passing mechanism to those currently
  defined in the database, or declared for the session.