Tree view in Oracle forms

Hello experts,
                     I am new in oracle forms and i am using oracle forms 11g with weblogic server 10.3.5 at windows7.I have a problem to make a tree item in oracle forms based on two tables.
I have 2 tables as:
TBL_ARTICAL_MSTR
ARTICLE_ID
ATRTICLE_TYPE
1
MAN
2
Women
TBL_ARTICLE_DTL
ARTICLE_NO
NAME
ARTICLE_ID
1
Jeans
1
2
Skirts
2
3
T-Shirt
1
Now I want a tree view as:
|
|___MAN
|       |______JEANS
|       |______T-Shirt
|
|___WOMEN
        |______Skirts
For this I have made a Record group with a sql query as:
SELECT 1 , level , TBL_ARTICAL_MSTR.ATRTICLE_TYPE,TBL_ARTICLE_DTL.NAME , NULL , to_char( TBL_ARTICLE_DTL.ARTICLE_NO)
FROM TBL_ARTICAL_MSTR LEFT JOIN TBL_ARTICLE_DTL ON TBL_ARTICAL_MSTR.ARTICLE_ID=TBL_ARTICLE_DTL.ARTICLE_ID
CONNECT BY prior TBL_ARTICLE_DTL.ARTICLE_NO = TBL_ARTICAL_MSTR.ARTICLE_ID
START WITH TBL_ARTICAL_MSTR.ARTICLE_ID=1
But There is no any output,Please help me to know that how can i solve it.
Thank You
regards
aaditya.

how to create hierarchical tree form
https://sites.google.com/site/craigsoraclestuff/oracle-forms---how-to-s/forms-how-to-create-a-hierachical-tree-form

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Edited by: 794982 on 17 sept. 2010 04:55
Edited by: 794982 on 17 sept. 2010 05:01
Edited by: 794982 on 17 sept. 2010 05:04
Edited by: 794982 on 17 sept. 2010 05:06
Edited by: 794982 on 17 sept. 2010 05:13
Edited by: 794982 on 17 sept. 2010 05:19
Edited by: 794982 on 17 sept. 2010 05:23

Ok Francois Thanks for your response.
Just I pricise i work with oracle forms version 9.0.4.0.19 .
But I am putting this code in trigger When_New_form_Instance but it didn't work.
When I execute it just shows a line with two arrows but not a real tree.
Then I do a block-non based and a elemnt with type hierarticall tree and a canevas.
and i create a record_group. and in a palette property of the element i precise the canevas and the record_group
I don't khnow where is the problem ?
Any other suggestion ? please
Regards.

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