Here's your problem: import org.jboss.cache.aop.annotation.Serializable It should be: import java.io.Serializable View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049403#4049403 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4049403