Rownum and contains() problem.THX

Question

hi,I meet a strange problem.
I employ rownum and full text index in my sql as follow.But it does not works well ,and nothing can be displayed at all.
The most strangest is , the sql which lies from line 3 to line 11 can works well(It could display what I want),but the whole(1~13) can't.
anyone could find out the problem?THX.
1 select *
2 from (
3 select row_.*,rownum as rn
4 from (
5 select *
6 from node c, s_title s1
7 where exists(select y.PKID FROM NODE_TYPE y WHERE y.PKID=s1.NODE_ID AND
8 y.PKID=c.PKID)
9 and contains(s1.value,'abc',1)>0 ORDER BY score(1) desc ,ORDERNO asc
10 ) row_
11 where rownum < 20
12 )
13 where rn>0

Answer 1

Please either post including a 4 digit Oracle version, or do not post at all.
Please also don't post vague generalities like 'works well' or 'doesn't work well'
Either post output, required output, or do not post at all.
Crystal balls have worn out here long since because many similar posters 'couldn't do the needful'
Sybrand Bakker
Senior Oracle DBA