bonjour, j ai un probleme quand je fais un maven install
ou clean du chap 8 du livre maven guide definition

je fais un

j ai comme error
C:\apps\maven\simple-parent>mvn install
[INFO] Scanning for projects...
[INFO] Reactor build order:
[INFO] Chapter 8 Simple Parent Project
[INFO] Chapter 8 Simple Object Model
[INFO] Simple Weather API
[INFO] Simple Persistence API
[INFO] Simple Command Line Tool
[INFO] Simple Web Application
[INFO] ------------------------------------------------------------------------
[INFO] Building Chapter 8 Simple Parent Project
[INFO] task-segment: [install]
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error building POM (may not be this project's POM).


Project ID: org.apache.maven.plugins:maven-site-plugin
POM Location: C:\Users\admin\.m2\repository\org\apache\maven\plugins\maven-site-
plugin\2.0-beta-7\maven-site-plugin-2.0-beta-7.pom

Reason: Not a v4.0.0 POM. for project org.apache.maven.plugins:maven-site-plugin
at C:\Users\admin\.m2\repository\org\apache\maven\plugins\maven-site-plugin\2.0
-beta-7\maven-site-plugin-2.0-beta-7.pom
ou un mv clean

[INFO] Scanning for projects...
[INFO] Reactor build order:
[INFO] Chapter 7 Simple Parent Project
[INFO] Chapter 8 Simple Object Model
[INFO] Simple Weather API
[INFO] Simple Persistence API
[INFO] Simple Command Line Tool
[INFO] Simple Web Application
[INFO] ------------------------------------------------------------------------
[INFO] Building Chapter 7 Simple Parent Project
[INFO] task-segment: [clean]
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error building POM (may not be this project's POM).


Project ID: org.apache.maven.plugins:maven-clean-plugin
POM Location: C:\Users\admin\.m2\repository\org\apache\maven\plugins\maven-clean
-plugin\2.2\maven-clean-plugin-2.2.pom

Reason: Not a v4.0.0 POM. for project org.apache.maven.plugins:maven-clean-plugi
n at C:\Users\admin\.m2\repository\org\apache\maven\plugins\maven-clean-plugin\2
.2\maven-clean-plugin-2.2.pom


[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Sat Mar 05 15:30:46 EST 2011
[INFO] Final Memory: 1M/15M
voici mon pom
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>org.sonatype.mavenbook.ch07</groupId>
	<artifactId>simple-parent</artifactId>
	<packaging>pom</packaging>
	<version>1.0</version>
	<name>Chapter 8 Simple Parent Project</name>
	<modules>
	     <module>simple-command</module>
		<module>simple-model</module>
		<module>simple-weather</module>
		<module>simple-persist</module>
		<module>simple-webapp</module>
	</modules>
	<build>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <configuration>
            <source>1.5</source>
            <target>1.5</target>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.codehaus.mojo</groupId>
          <artifactId>hibernate3-maven-plugin</artifactId>
          <version>2.1</version>
          <configuration>
            <components>
              <component>
                <name>hbm2ddl</name>
                <implementation>annotationconfiguration</implementation>
              </component>
            </components>
          </configuration>
          <dependencies>
            <dependency>
              <groupId>hsqldb</groupId>
              <artifactId>hsqldb</artifactId>
              <version>${hsqldb.version}</version>
            </dependency>
          </dependencies>
        </plugin>
      </plugins>
   </pluginManagement> 
  </build>
 
  <properties>
    <hibernate.annotations.version>3.3.0.ga</hibernate.annotations.version>
    <hsqldb.version>1.8.0.7</hsqldb.version>
  </properties>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring</artifactId>
        <version>2.0.7</version>
      </dependency>
      <dependency>
        <groupId>org.apache.velocity</groupId>
        <artifactId>velocity</artifactId>
        <version>1.5</version>
      </dependency>  
      <dependency>
        <groupId>javax.persistence</groupId>
        <artifactId>persistence-api</artifactId>
        <version>1.0</version>
      </dependency>
      <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-annotations</artifactId>
        <version>${hibernate.annotations.version}</version>
      </dependency>
      <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-commons-annotations</artifactId>
        <version>${hibernate.annotations.version}</version>
      </dependency>
      <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate</artifactId>
        <version>3.2.5.ga</version>
        <exclusions>
          <exclusion>
            <groupId>javax.transaction</groupId>
            <artifactId>jta</artifactId>
          </exclusion>
        </exclusions>
      </dependency>
    </dependencies>
  </dependencyManagement>
 
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>
je debute avec maven
je sais vraiment pas ce qui se passe
merci d avance