In order to install JBossWS the following steps are necessary:

1.) Modify the target container location in ant.properties
2.) Make sure to uninstall any deployed stack

ant undeploy-<jboss.version>

I.e. 'ant undeploy-jboss422'

3.) Install JBossWS-Metro into the target container

ant deploy-<jboss-version>

I.e. 'ant deploy-jboss422'

4.) Execute the samples to verify your installation

'ant tests'

You should see no errors.