DEAR JULIAN,
I DID WHAT YOU SAID,BUT I RECIEVED THIS ERROR:
ORA-24005 : MUST USE DBMS_AQADM.DROP_QUEUE_TABLE
TO DROP QUEUE TABLE;

I DROPED QUEUE TABLES VIA DBMS_AQADM.DROP_QUEUE_TABLE AND THEN EXECUTED CATDEFRT.SQL ,MY PROBLEM IS SOLVED AND NOW I AM
VERY GRATEFUL .


WITH BEST REGARDS
PARVIN