Foreign Key Problem

Hi
I have two tables created as follow.

Table1     Columns    T1Cod1 varchar2(3) NOT NULL   Primary Key
                                T1Cod2 varchar2(3) NOT NULL
                                T1Cod3 varchar2(3) NOT NULL

Table2     Columns    T2Cod1 varchar2(3) NOT NULL  Primary Key
                                 T2Cod2 varchar2(3) NOT NULL Primary Key

                                 T2Cod3 varchar2(3) NOT NULL Primary Key

I'd like to create a relationship between two tables as follow

ALTER TABLE Table1 CONSTRAINT XPTO_FK

      FOREIGN KEY (T1Cod2,T1Cod3)
      REFERENCES  Table2 (T2Cod1,T2Cod3)

i.e. only the Columns T2Cod1 and T2Cod3 From Table2 are the Key Components of Foreign Key.
When i try this an error occurs
ORA-02270: No matching unique or Primary Key for this Column List.

Is there any way to do that.

Thanks in Advence
Joe Received on Fri Feb 20 1998 - 00:00:00 CST