Yeah i am following this website and trying to do http://jbws.dyndns.org/mediawiki/index.php?title=JBossWS I am using jboss app server of 4.2.2GA version, jbossws-1.2.1GA version and jdk 1.5, ant 1.7.0. I have downloaded the jbossws-1.2.1GA stack and unzipped it and by pointing to the build file in the samples folder, i typed the command "ant tests" and my build failed with the mentioned exception. java.lang.IllegalStateException: Could not load provider:org.jboss.ws.tools.jaxw s.impl.WSContractConsumerFactoryImpl View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4144902#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...