fnd_user_pkg包里的两个changepassword都没办法使用？

[love_benshanhou]

调用oracle ebs中的包进行更改用户的密码，fnd_user_pkg包里的两个changepassword都没办法使用？

DECLARE

BEGIN

fnd_user_pkg.changepassword('lijianguo','welcome');


EXCEPTION
WHEN OTHERS THEN
--NULL;
DBMS_OUTPUT.PUT_LINE('ERROR:' || sqlerrm) ;

END;


为啥老是提示ora-06550

----------------------------------------------------------------------------
--
-- ChangePassword (PUBLIC)
--   Set new password for a given user without having to provide
--   the old password.
--
-- Usage example in pl/sql
--   begin fnd_user_pkg.changepassword('SCOTT', 'WELCOME'); end;
--
-- Input (Mandatory)
--  username:       User Name
--  newpassword     New Password
--
function ChangePassword(username      varchar2,
                        newpassword   varchar2) return boolean;
----------------------------------------------------------------------------
--
-- ChangePassword (PUBLIC)
--   Set new password for a given user if the existing password needed to be
--   validated before changing to the new password.
--
-- Usage example in pl/sql
--   begin fnd_user_pkg.changepassword('SCOTT', 'TIGER', 'WELCOME'); end;
--
-- Input (Mandatory)
--  username:       User Name
--  oldpassword     Old Password
--  newpassword     New Password
--
function ChangePassword(username      varchar2,
                        oldpassword   varchar2,
                        newpassword   varchar2) return boolean;