Using 2 catsearch predicates in the same where clause

(If I could I would double the points for someone who provides an answer to this problem???)

This is Oracle 9.2.0.6.0 and Oracle9i Oracle Text on Windows 2000 SP4. CBO is on.

Help!!! I'm trying to use a query that uses 2 catsearch calls in the same where clause. When I try, I receive the DRG-10849 error.

select *
from tbl_auction
where  CATSEARCH(title, 'CAMERA', NULL) >0
       AND
       CATSEARCH(description, 'RIDER', NULL) >0

This results in error message:

ORA-10849: catsearch does not support functional invocation.
DRG-10599: column not indexed.

To explain, I will provide my "prototype" environment, the query and results. My production environment uses table partitionning and CBO so I setup my prototype the same way.

create table tbl_auction(
item_id number,
title varchar2(100),
description varchar2(100),
category_id number,
price number,
bid_close date)
partition by list (category_id) (
      partition motorcycle values (5),
      partition camera values (2),
      partition printer values (1))

Begin
ctx_ddl.create_index_set('tbl_auction_desc_iset');
end;

CREATE INDEX tbl_auction_descx ON TBL_AUCTION(description) INDEXTYPE IS CTXSYS.CTXCAT PARAMETERS
('index set tbl_auction_desc_iset');

Begin
ctx_ddl.create_index_set('tbl_auction_title_iset');
end;

CREATE INDEX tbl_auction_titlex ON TBL_AUCTION(title) INDEXTYPE IS CTXSYS.CTXCAT PARAMETERS
('index set tbl_auction_title_iset');

insert into tbl_auction values(1, 'Harley Davidson Sportster', '885cc James Dean Sportster. Authentic seat and original chrome', 5, 43000, sysdate);
insert into tbl_auction values(2, 'Harley Davidson Softtail', '1300cc road bike', 5, 13000, sysdate);
insert into tbl_auction values(3, 'Harley Davidson Fatboy', '1300cc black low rider - lots of chrome', 5, 22000, sysdate);
insert into tbl_auction values(4, 'Honda Shadow Classic', '750cc two tone burgandy and tan', 5, 11400, sysdate);
insert into tbl_auction values(5, 'Honda Vision', '500cc affordable beginner cycle', 5, 8500, sysdate);
insert into tbl_auction values(6, 'Cannon Digital Camera', 'Rebel 6.3Mpixel with removable lenses', 2, 800, sysdate);
insert into tbl_auction values(7, 'HP Printer Color', '1200 dbi color printer with individual cartridges', 1, 320, sysdate);
insert into tbl_auction values(8, 'Epson Photo Printer', 'Cutting edge printing of photos directly from your memory stick', 1, 129, sysdate);
insert into tbl_auction values(9, 'Optimax Digital Camera', 'Very affordable beginner camera with automatic everything', 2, 99, sysdate);
insert into tbl_auction values(9, 'Kodak SLR', 'James Dean replica', 2, 899, sysdate);

select *
from tbl_auction
where  CATSEARCH(title, 'CAMERA', NULL) >0
       and
       CATSEARCH(description, 'RIDER', NULL) >0