I have a problem of NLS_LANG with my client 10.2.0.4

 hello,      I have a problem with my client Oracle 10.2.0.4, jdbc or sqlnet.
When I execute on my database a query from my client in french_FRANCE the sort of my query is different of the result of my client in english_AMERICAN. My database is in NLS_LANG  American_america.utf8
I would like obtain the same result from my sort.
What are the parameters of client or of my database to obtain the same result ?

Who can help me ?
JP

the query is :
select * from WTRUN2.XX_LIENARTICLEDOC_PURCHASE
WHERE NUMERO_ARTICLE = 'CCA2212' and VERSION_ARTICLE = 'Q.A.1';