Problem de connexion à la database human_resources

Je suis un vrai débutant avec JDevelopper.
Je suivais le tutorial de l’Oracle et j’ai essayé de créer une connexion à la database human_resources avec le nom hr et mot de passe par défaut hr.
J’ai pris les valeurs par défaut de l’assistant mais voilà l’erreur que j’ai obtenu :
Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
localhost:1521:ORCL

User,
Sorry, I don't speak French. Are you using Oracle XE? If so, use XE for the SID.
Searching for "ORA-12505 HR" found [url http://forums.oracle.com/forums/thread.jspa?messageID=1700877]this
John

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Attachments:
Screenshot.zip ‏425 KB

Thanks Scott,
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Attachments:
Error.jpg ‏59 KB

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Message was edited by:
user616266

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------------------ EDIT -------------------
Whoops, I might had a problem with a not correctly shut down database (just shutted windows down without killing the instance - didn't know this wasn't ok). Still evaluating the issue. But to say the least, it seems the application server has nothing to do with my problem :)
Message was edited by:
mathias.ringhof

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