A bit of googling for this particular class led me to a post which said anonymous wrote : | This is because you are using a wrong jar file.You are using mysql-connector-java-3.1.10-bin-g.jar instead of mysql-connector-java-3.1.10-bin.jar.So remove the first jar from the classpath and start using the second jar for your application. See if that helps. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077290#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...