Hibernate, init Error

Bonjour,

je suis débutant avec Hibernate, j'ai l'erreur affichée en bas

voici mon fichier de config,

dans mon lib j'ai:

ant-antlr-1.6.2.jar
asm.jar
asm-attrs.jar
aspectj-1.5.3.jar
cglib-2.1.jar
commons-collections-2.1.1.jar
commons-logging-1.0.4.jar
dom4j-1.5.2.jar
hibernate3.jar
jta.jar
log4j-1.2.9.jar
mysql-connector-java-5.0.4-bin-g.jar

---hibernate.cfg.xml---------------

<?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>


<property name="hibernate.connection.url">jdbc:mysql://localhost/mabase</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.username">user1</property>
<property name="hibernate.connection.password">mypass</property>



<property name="dialect">org.hibernate.dialect.MySQLDialect</property>

<property name="hibernate.show_sql">true</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
</session-factory>
</hibernate-configuration>

----Client.hbm.xml---------------------------

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

<hibernate-mapping>
<class name="com.pv.hibernate.beans.Client" table="client">

<id name="Id" column="Id" type="integer" unsaved-value="none" >
<generator class="asigned"/>
</id>

<property name="Nom" column="Nom" type="string"/>
<property name="RS" column="RS" type="string"/>
<property name="Tel" column="Tel" type="string"/>

</class>

</hibernate-mapping>

-----Log------------------------

17:25:04,965 INFO Environment:460 - Hibernate 3.0
17:25:04,965 INFO Environment:473 - hibernate.properties not found
17:25:04,965 INFO Environment:506 - using CGLIB reflection optimizer
17:25:04,981 INFO Environment:536 - using JDK 1.4 java.sql.Timestamp handling
17:25:05,075 INFO Configuration:1159 - configuring from resource: /hibernate.cfg.xml
17:25:05,075 INFO Configuration:1130 - Configuration resource: /hibernate.cfg.xml
17:25:05,200 INFO Configuration:1271 - Configured SessionFactory: null
17:25:05,247 INFO Configuration:851 - processing extends queue
17:25:05,247 INFO Configuration:855 - processing collection mappings
17:25:05,247 INFO Configuration:864 - processing association property references
17:25:05,247 INFO Configuration:893 - processing foreign key constraints
17:25:05,294 INFO Dialect:91 - Using dialect: org.hibernate.dialect.MySQLDialect
17:25:05,387 INFO SettingsFactory:87 - Maximum outer join fetch depth: 2
17:25:05,387 INFO SettingsFactory:90 - Default batch fetch size: 1
17:25:05,387 INFO SettingsFactory:94 - Generate SQL with comments: disabled
17:25:05,387 INFO SettingsFactory:98 - Order SQL updates by primary key: disabled
17:25:05,387 INFO SettingsFactory:273 - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
17:25:05,387 INFO ASTQueryTranslatorFactory:21 - Using ASTQueryTranslatorFactory
17:25:05,387 INFO SettingsFactory:106 - Query language substitutions: {}
17:25:05,403 INFO DriverManagerConnectionProvider:41 - Using Hibernate built-in connection pool (not for production use!)
17:25:05,403 INFO DriverManagerConnectionProvider:42 - Hibernate connection pool size: 20
17:25:05,403 INFO DriverManagerConnectionProvider:45 - autocommit mode: false
java.lang.NoClassDefFoundError: org/aspectj/lang/Signature
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:57)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:80)
at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:301)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:111)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1505)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1053)
at com.pv.hibernate.Utils.HibernateUtils.<clinit>(HibernateUtils.java:16)
at com.pv.hibernate.test.Test.main(Test.java:11)
Exception in thread "main"