SQL & PL/SQL

Hello,

My tables:

create table DetailResume(
d_id number(14) primary key,
cv_id number(14) constraint DetailResume_fk references CvProperties(cv_id),
cat_id number(14) constraint DetailResume_fk2 references CvCategories(cat_id),
DetailResume clob);

create sequence DetailResume_seq
start with 1 increment by 1;

create or replace trigger DetailResume_trig
before insert on DetailResume
referencing new as new
for each row
begin 
select DetailResume_seq.nextval into :new.d_id from dual;
end;
/

After giving respective grants to the user I have created this index

CREATE INDEX idx_detailResume ON detailResume(detailResume)
INDEXTYPE IS CTXSYS.CONTEXT;

Now I am making query as follow and its working fine:

SELECT SCORE(1), cv_id FROM detailResume WHERE CONTAINS(detailResume, 'cardiology', 1) > 0 and cat_id=5 order by SCORE(1) desc;

When I am using into my Java program:

String query = " SELECT SCORE(1), cv_id FROM detailResume WHERE CONTAINS(detailResume,'cardiology', 1) > 0 and cat_id=5"; 

		String query1 = " insert into jobResponses(job_id,cv_id,responseStatus) values (?,?,0)";       

		PreparedStatement ps=cnn.prepareStatement(query);		

		rs=ps.executeQuery();
		while(rs.next()){
		String score = rs.getString(1);
		String cvId = rs.getString(2);
		}
		ps.close();
		rs.close();						
		cnn.commit();
		cnn.close();

Then its throwing the following error:

java.sql.SQLException: ORA-20000: Oracle Text error:
DRG-10599: column is not indexed

Please advise

Thanks in anticipation