Configuring Maven, jenkins with Sonar

Configuring Maven, jenkins with Sonar

I have installed Jenkins and Sonar, both work fine. I am able to build a
maven android project using Jenkins. No i want to run Sonar on the android
project. I have installed the Sonar plugin in Jenkins. Configured the
sonar module in the configure system module and added a post build task
for sonar to run
[ERROR] Plugin org.codehaus.mojo:sonar-maven-plugin:sonar or one of its
dependencies could not be resolved: Failed to read artifact descriptor for
org.codehaus.mojo:sonar-maven-plugin:jar:sonar: Could not find artifact
org.codehaus.mojo:sonar-maven-plugin:pom:sonar in nbs-repo
(http://10.10.2.89:8081/nexus/content/groups/public/) -> [Help 1]
org.apache.maven.plugin.PluginResolutionException: Plugin
org.codehaus.mojo:sonar-maven-plugin:sonar or one of its dependencies
could not be resolved: Failed to read artifact descriptor for
org.codehaus.mojo:sonar-maven-plugin:jar:sonar
at
org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:129)
at
org.apache.maven.plugin.internal.DefaultMavenPluginManager.getPluginDescriptor(DefaultMavenPluginManager.java:142)
at
org.apache.maven.plugin.internal.DefaultMavenPluginManager.getMojoDescriptor(DefaultMavenPluginManager.java:261)
at
org.apache.maven.plugin.DefaultBuildPluginManager.getMojoDescriptor(DefaultBuildPluginManager.java:185)
at
org.apache.maven.lifecycle.internal.MojoDescriptorCreator.getMojoDescriptor(MojoDescriptorCreator.java:235)
at
org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:106)
at
My nexus installation works fine ? What am i doing wrong. My maven pom.xml
does not contain any sonar plugin. What am i doing wrong?
Kind Regards