hibernate.cfg.xml Entité externe introuvable

Bonjour
je commence avec Hibernate

et voici donc ma première galère :
voici mon entete de hibernate.cfg.xml

Code:

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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory >

Le lien

Code:

http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd

fonctionne bien

et quand j'execute mon code :

Code:

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static {
   try {
   // Crée la SessionFactory
   sessionFactory =
	 new Configuration().configure().buildSessionFactory();
   } catch (HibernateException ex) {
   throw new RuntimeException("Problème de configuration : "
   + ex.getMessage(), ex);
   }
   }

il me met :

Code:

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7 août 2006 11:37:11 net.sf.hibernate.cfg.Environment <clinit>
INFO: Hibernate 2.1.6
7 août 2006 11:37:11 net.sf.hibernate.cfg.Environment <clinit>
INFO: hibernate.properties not found
7 août 2006 11:37:11 net.sf.hibernate.cfg.Environment <clinit>
INFO: using CGLIB reflection optimizer
7 août 2006 11:37:11 net.sf.hibernate.cfg.Configuration configure
INFO: configuring from resource: /hibernate.cfg.xml
7 août 2006 11:37:11 net.sf.hibernate.cfg.Configuration getConfigurationInputStream
INFO: Configuration resource: /hibernate.cfg.xml
7 août 2006 11:37:16 net.sf.hibernate.util.XMLHelper$ErrorLogger error
GRAVE: Error parsing XML: /hibernate.cfg.xml(2) Entité externe introuvable : "file://c:/temp/hibernate-configuration-3.0.dtd".
7 août 2006 11:37:16 net.sf.hibernate.cfg.Configuration doConfigure
GRAVE: problem parsing configuration/hibernate.cfg.xml
org.dom4j.DocumentException: Error on line 2 of document  : Entité externe introuvable : "file://c:/temp/hibernate-configuration-3.0.dtd". Nested exception: Entité externe introuvable : "file://c:/temp/hibernate-configuration-3.0.dtd".
	at org.dom4j.io.SAXReader.read(SAXReader.java:355)
	at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:953)
	at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:897)
	at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:883)
	at com.minosis.hibernate.HibernateUtil.<clinit>(HibernateUtil.java:14)
	at Test.main(Test.java:10)
Nested exception: 
java.net.UnknownHostException: c
	at org.apache.crimson.parser.Parser2.fatal(Unknown Source)
	at org.apache.crimson.parser.Parser2.externalParameterEntity(Unknown Source)
	at org.apache.crimson.parser.Parser2.maybeDoctypeDecl(Unknown Source)
	at org.apache.crimson.parser.Parser2.parseInternal(Unknown Source)
	at org.apache.crimson.parser.Parser2.parse(Unknown Source)
	at org.apache.crimson.parser.XMLReaderImpl.parse(Unknown Source)
	at org.dom4j.io.SAXReader.read(SAXReader.java:339)
	at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:953)
	at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:897)
	at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:883)
	at com.minosis.hibernate.HibernateUtil.<clinit>(HibernateUtil.java:14)
	at Test.main(Test.java:10)
java.lang.ExceptionInInitializerError
	at Test.main(Test.java:10)
Caused by: java.lang.RuntimeException: Problème de configuration : problem parsing configuration/hibernate.cfg.xml
	at com.minosis.hibernate.HibernateUtil.<clinit>(HibernateUtil.java:16)
	... 1 more
Caused by: net.sf.hibernate.HibernateException: problem parsing configuration/hibernate.cfg.xml
	at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:958)
	at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:897)
	at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:883)
	at com.minosis.hibernate.HibernateUtil.<clinit>(HibernateUtil.java:14)
	... 1 more
Caused by: org.dom4j.DocumentException: Error on line 2 of document  : Entité externe introuvable : "file://c:/temp/hibernate-configuration-3.0.dtd". Nested exception: Entité externe introuvable : "file://c:/temp/hibernate-configuration-3.0.dtd".
	at org.dom4j.io.SAXReader.read(SAXReader.java:355)
	at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:953)
	... 4 more
Exception in thread "main"

si qqn a une idée ??

merci