Thanks PeterJ, I've done all these steps before with JBoss 4.2.2 and 4.2.3 (most of them is done by the build process). The only difference is that I have 2 data sources, so that JBM has DefaultDS, and the app has another. That always worked fine. The only exceptions I can see in logs are reported as DEBUG. I see lots of these: 13:36:46,437 DEBUG [BeanMetaDataICF] Failed to get property value for bean: org.jboss.beans.metadata.plugins.AbstractBeanMetaData, property: properties | java.lang.IllegalArgumentException: Property is not readable: propertyReplace for org.jboss.beans.metadata.plugins.AbstractPropertyMetaData | at org.jboss.beans.info.plugins.DefaultPropertyInfo.get(DefaultPropertyInfo.java:131) | at org.jboss.beans.info.plugins.BeanInfoUtil.getNestedTarget(BeanInfoUtil.java:78) | at org.jboss.beans.info.plugins.BeanInfoUtil.get(BeanInfoUtil.java:142) | at org.jboss.beans.info.plugins.AbstractBeanInfo.getProperty(AbstractBeanInfo.java:284) | at org.jboss.metatype.plugins.values.DefaultMetaValueFactory.createCompositeValue(DefaultMetaValueFactory.java:471) | at org.jboss.metatype.plugins.values.DefaultMetaValueFactory.internalCreate(DefaultMetaValueFactory.java:1023) | at org.jboss.metatype.plugins.values.DefaultMetaValueFactory.createCollectionValue(DefaultMetaValueFactory.java:247) | at org.jboss.metatype.plugins.values.DefaultMetaValueFactory.internalCreate(DefaultMetaValueFactory.java:1029) | at org.jboss.metatype.plugins.values.DefaultMetaValueFactory.create(DefaultMetaValueFactory.java:542) | at org.jboss.deployers.plugins.managed.BeanMetaDataICF.getValue(BeanMetaDataICF.java:165) | at org.jboss.deployers.plugins.managed.BeanMetaDataICF.getValue(BeanMetaDataICF.java:48) | at org.jboss.managed.plugins.factory.AbstractManagedObjectPopulator.populateValues(AbstractManagedObjectPopulator.java:201) | at org.jboss.managed.plugins.factory.AbstractManagedObjectPopulator.populateManagedObject(AbstractManagedObjectPopulator.java:130) | at org.jboss.managed.plugins.factory.AbstractManagedObjectFactory.initManagedObject(AbstractManagedObjectFactory.java:364) | at org.jboss.managed.api.factory.ManagedObjectFactory.initManagedObject(ManagedObjectFactory.java:77) | at org.jboss.system.server.profileservice.ProfileServiceBootstrap.initBootstrapMDs(ProfileServiceBootstrap.java:466) | at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:199) | at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:405) | at org.jboss.Main.boot(Main.java:209) | at org.jboss.Main$1.run(Main.java:547) | at java.lang.Thread.run(Thread.java:595) | and then goes this one, near the end: 13:36:46,453 DEBUG [ProfileServiceBootstrap] Failed to build ManagedDeployment for: AbstractKernelDeployment@da8742{name=file:/C:/myApp/jboss-5.0.0.GA/server/default/conf/bootstrap/vfs.xml installed=true beanFactories=[AbstractBeanMetaData@1b64b70{name=VFSCache bean=null properties= constructor=AbstractConstructorMetaData@e1dac2{parameters=[null] factoryClass=org.jboss.virtual.spi.cache.VFSCacheFactory factoryMethod=getInstance} autowireCandidate=true start=AbstractLifecycleMetaData@1e12f6d{method=start whenRequired=ControllerState@112bc7b{Start} parameters= }}, AbstractBeanMetaData@11456c5{name=VfsNamesExceptionHandler bean=org.jboss.virtual.plugins.context.helpers.NamesExceptionHandler properties= constructor=AbstractConstructorMetaData(a)4ca42b{parameters=[java.lang.String]} autowireCandidate=true}, AbstractBeanMetaData@1ae0e7d{name=JBossVFSInitializer bean=org.jboss.virtual.plugins.cache.PreInitializeVFSContexts properties=[holdReference, initializedVFSContexts] constructor=null autowireCandidate=true}]} | org.jboss.deployers.spi.DeploymentException: Error deploying: file:/C:/myApp/jboss-5.0.0.GA/server/default/conf/bootstrap/vfs.xml | at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49) | at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataFactoryVisitor.deploy(BeanMetaDataFactoryVisitor.java:136) | at org.jboss.system.server.profileservice.ProfileServiceBootstrap.initBootstrapMDs(ProfileServiceBootstrap.java:453) | at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:199) | at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:405) | at org.jboss.Main.boot(Main.java:209) | at org.jboss.Main$1.run(Main.java:547) | at java.lang.Thread.run(Thread.java:595) | Caused by: java.lang.IllegalStateException: ClassLoader has not been set | at org.jboss.deployers.structure.spi.helpers.AbstractDeploymentUnit.getClassLoader(AbstractDeploymentUnit.java:152) | at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataFactoryVisitor.addBeanComponent(BeanMetaDataFactoryVisitor.java:60) | at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataFactoryVisitor.deploy(BeanMetaDataFactoryVisitor.java:126) | ... 6 more | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4197116#... 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