build broken of RHQ plugin

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[INFO] Total time: 4.121s
[INFO] Finished at: Sun Apr 24 12:07:38 CEST 2011
[INFO] Final Memory: 18M/162M
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[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:2.7:javadoc (default) on project infinispan-rhq-plugin: An error has occurred in JavaDocs report generation:
[ERROR] Exit code: 1 - javadoc: error - Cannot find doclet class org.infinispan.tools.rhq.RhqPluginXmlGenerator
[ERROR]
[ERROR] Command line was: /opt/jdk1.6.0_25/jre/../bin/javadoc @options @packages
[ERROR]
[ERROR] Refer to the generated Javadoc files in '/home/sanne/workspaces/infinispan/infinispan/rhq-plugin/target/site/apidocs' dir.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException