Maven-jetty-plugin hot deploy multi module project - deployment

Question

I am working on alfresco and I have a multi module project that looks like that :
- parentModule
- alfrescoModule
- shareModule
- ampAlfrescoModule (contains java classes)
- ampShareModule
- runnerModule
I would like to hot redeploy modified classes from the ampAlfrescoModule
Here is the content of runnerModule's pom :
<profiles>
<profile>
<id>run</id>
<activation>
<property>
<name>run</name>
</property>
</activation>
<properties>
<runner.host>127.0.0.1</runner.host>
<runner.port>8080</runner.port>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<executions>
<execution>
<id>run</id>
<goals>
<goal>run</goal>
</goals>
<phase>integration-test</phase>
</execution>
</executions>
<configuration>
//this is what i've tested but it doesn't work
<scanIntervalSeconds>5</scanIntervalSeconds>
<classesDirectory>../ampAlfrescoProject/target/classes</classesDirectory>
<!-- Following 3 properties set an empty ROOT context, which is mandatory
to run jetty:run plugin -->
<contextPath>/</contextPath>
<webAppSourceDirectory>.</webAppSourceDirectory>
<webXml>jetty/root-web.xml</webXml>
<contextHandlers>
<contextHandler implementation="org.mortbay.jetty.webapp.WebAppContext">
<war>${project.basedir}/../alfrescoProject/target/alfrescoProject.war</war>
<contextPath>/alfresco</contextPath>
</contextHandler>
<contextHandler implementation="org.mortbay.jetty.webapp.WebAppContext">
<war>${alfresco.solr.dir}/apache-solr-1.4.1-overlay.war</war>
<contextPath>/solr</contextPath>
</contextHandler>
<contextHandler implementation="org.mortbay.jetty.webapp.WebAppContext">
<war>${project.basedir}/../shareProject/target/shareProject.war</war>
<contextPath>/share</contextPath>
</contextHandler>
</contextHandlers>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
It deploys 3 wars in jetty. I have to point to ampAlfrescoModule/target/classes with classesDirectory but it doesn't work.
This is the ouptut I get :
[INFO] restarting org.mortbay.jetty.plugin.Jetty6PluginWebAppContext#986d0e{/,C:\Users\..\workspace\AllInOneAdvancedSearch\runnerProject}
[INFO] Webapp source directory = C:\Users\..\workspace\AllInOneAdvancedSearch\runnerProject
[INFO] Reload Mechanic: automatic
[INFO] Classes directory C:\Users\..\workspace\AllInOneAdvancedSearch\ampAlfrescoProject\target\classes
[INFO] Context path = /
[INFO] Tmp directory = determined at runtime
[INFO] Web defaults = org/mortbay/jetty/webapp/webdefault.xml
[INFO] Web overrides = none
[INFO] web.xml file = C:\Users\..\workspace\AllInOneAdvancedSearch\runnerProject\jetty\root-web.xml
[INFO] Webapp directory = C:\Users\..\workspace\AllInOneAdvancedSearch\runnerProject
[INFO] Reconfiguring scanner after change to pom.xml ...
2013-05-27 10:30:51.956:INFO::No Transaction manager found - if your webapp requires one, please configure one.
[INFO] Restart completed at Mon May 27 10:30:51 CEST 2013
When i run mvn compile my classes are not updated on the server, changes are not detected
Any help would be appreciated, thx