I still had class-cast exc even with code you provided. below output from loader-rep as suggested in article you gave link to. I am loading these dynamically with intellij idea IDE thanks yanlong book.HelloBean Information Repository cache version: book.HelloBean(11be075).ClassLoader=org.jboss.mx.loading.UnifiedClassLoader3@1683e80{ url=file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ,addedOrder=49} ..org.jboss.mx.loading.UnifiedClassLoader3@1683e80{ url=file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ,addedOrder=49} ....file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ..org.jboss.system.server.NoAnnotationURLClassLoader@1de3f2d ..sun.misc.Launcher$AppClassLoader@a39137 ....file:/C:/Sun/AppServer/jdk/lib/tools.jar ....file:/D:/devel/java/jboss-4.2.2.GA/bin/run.jar ..sun.misc.Launcher$ExtClassLoader@92e78c ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/dnsns.jar ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/localedata.jar ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/sunjce_provider.jar ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/sunpkcs11.jar ++++CodeSource: (file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ) Implemented Interfaces: ++interface book.Hello(1f20541) ++++ClassLoader: org.jboss.mx.loading.UnifiedClassLoader3@1683e80{ url=file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ,addedOrder=49} ++++CodeSource: (file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ) ### Instance0 found in UCL: org.jboss.mx.loading.UnifiedClassLoader3@1683e80{ url=file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ,addedOrder=49} book.Hello Information Repository cache version: book.Hello(1f20541).ClassLoader=org.jboss.mx.loading.UnifiedClassLoader3@1683e80{ url=file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ,addedOrder=49} ..org.jboss.mx.loading.UnifiedClassLoader3@1683e80{ url=file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ,addedOrder=49} ....file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ..org.jboss.system.server.NoAnnotationURLClassLoader@1de3f2d ..sun.misc.Launcher$AppClassLoader@a39137 ....file:/C:/Sun/AppServer/jdk/lib/tools.jar ....file:/D:/devel/java/jboss-4.2.2.GA/bin/run.jar ..sun.misc.Launcher$ExtClassLoader@92e78c ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/dnsns.jar ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/localedata.jar ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/sunjce_provider.jar ....file:/C:/Sun/AppServer/jdk/jre/lib/ext/sunpkcs11.jar ++++CodeSource: (file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ) Implemented Interfaces: ### Instance0 found in UCL: org.jboss.mx.loading.UnifiedClassLoader3@1683e80{ url=file:/D:/devel/java/jboss-4.2.2.GA/server/all/tmp/deploy/tmp64792EJB.jar ,addedOrder=49} I am deploying war file with jsp and classes and jar file with classes only. web.war -WEB-INF --classes --- ...all classes in packages -index.jsp ejb.jar -beans -book -META-INF beans and book are packages for my sample and book sample. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4120551#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...