Problems with reverse engineer and keys

[Maciej Kotok]

Im trying to reverse engineer script for Oracle 8.1.7 useing
PowerDesigner 9.5.1.736. The problem is that i cant reverse engineer
any keys - primary nor foregin.

here is the part of this script:

CREATE TABLE HOO_EKD
(Z_ID_EKD NUMBER(12) NOT NULL
,Z_ID_EKD_PARENT NUMBER(12) NOT NULL
,Z_NR_EKD NUMBER(10) NOT NULL
,Z_OPIS VARCHAR2(240) NOT NULL
,Z_SYSDATA DATE NOT NULL
,Z_USER VARCHAR2(16) NOT NULL
,Z_DATA_DO DATE
,Z_AKTUALNY VARCHAR2(1) NOT NULL
);

CREATE INDEX HOO_EKD ON HOO_EKD
(Z_ID_EKD_PARENT
,Z_NR_EKD);

ALTER TABLE HOO_EKD
ADD (CONSTRAINT EKD_PK PRIMARY KEY
(Z_ID_EKD)
EXCEPTIONS INTO HOO_ZLE_WIEZY);

and here what do i get in PD Output window

Reverse Engineering
Reverse engineers the file D:\tolek\tabele\scrypttest1.sql...

Lines 1 to 10: Table HOO_EKD
Lines 12 to 14: Index HOO_EKD
Lines 16 to 19: "ALTER TABLE HOO_EKD" skipped.

The file has been successfully reverse engineered.

And there is no primary key in my tabel... :(
Does any body know what should I do?