Maven ne trouve pas le plugin jetty

Bonjour à tous,

mvn eclipse:eclipse me donne l'erreur ci-dessous alors que j'ai installé le plugin jetty (jetty-maven-plugin-7.0.0.RC7-20090930.130530-1.jar ) avec succes et je le vois bien de le repository :

Citation:

C:\Documents and Settings\ingenieur11\workspace\springswf> mvn clipse:eclipse
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'eclipse'.
[INFO] ------------------------------------------------------------------------
[INFO] Building springswf Maven Webapp
[INFO] task-segment: [eclipse:eclipse]
[INFO] ------------------------------------------------------------------------
[INFO] Preparing eclipse:eclipse
Downloading: http://repo1.maven.org/maven2/org/mortbay/jetty/maven-jetty-plugin/${jetty-version}/maven-jetty-plugin-${jetty-version}.pom
Downloading: http://repo1.maven.org/maven2/org/mortbay/jetty/maven-jetty-plugin/${jetty-version}/maven-jetty-plugin-${jetty-version}.pom
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

GroupId: org.mortbay.jetty
ArtifactId: maven-jetty-plugin
Version: ${jetty-version}

Reason: Unable to download the artifact from any repository

org.mortbay.jetty:maven-jetty-plugin:pom:${jetty-version}

from the specified remote repositories:
central (http://repo1.maven.org/maven2)

[INFO] ------------------------------------------------------------------------
mon POM.xml
Code:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 <build> <finalName>springswf</finalName> <defaultGoal>jetty:run</defaultGoal> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> <verbose>true</verbose> </configuration> </plugin> <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>maven-jetty-plugin</artifactId> <version>${jetty-version}</version> <configuration> <scanIntervalSeconds>30</scanIntervalSeconds> </configuration> </plugin> </plugins> </build>
Merci pour votre aide