Property scanWars causes DeploymentException on admin-console

In order to deploy EJB classes inside my WAR application (folder WEB-INF/classes) I changed the property "scanWars" inside
the file "deployers/ejb3.deployer/META-INF/ejb3-deployers-jboss-beans.xml"

[code]
<!-- Should war deployments be scanned for annotated ejbs -->
<property name="scanWars">true</property>
[/code]

After doing that, my JBoss Administration Console (and other web applications) do not start anymore.
Error:

[code]
15:27:41,292 ERROR [AbstractKernelController] Error installing to Real: name=vfsfile:/D:/jboss-5.1.0.GA/server/default/deploy/admin-console.war/ state=PreReal mode=Manual requiredState=Real
org.jboss.deployers.spi.DeploymentException: Error deploying admin-console.war: failed to initialize bean container
at org.jboss.ejb3.deployers.Ejb3Deployer.deploy(Ejb3Deployer.java:196)
at org.jboss.ejb3.deployers.Ejb3Deployer.deploy(Ejb3Deployer.java:99)
at org.jboss.deployers.vfs.spi.deployer.AbstractVFSRealDeployer.internalDeploy(AbstractVFSRealDeployer.java:45)
at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
at org.jboss.system.server.profileservice.repository.ProfileDeployAction.install(ProfileDeployAction.java:70)
at org.jboss.system.server.profileservice.repository.AbstractProfileAction.install(AbstractProfileAction.java:53)
at org.jboss.system.server.profileservice.repository.AbstractProfileService.install(AbstractProfileService.java:361)
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
at org.jboss.system.server.profileservice.repository.AbstractProfileService.activateProfile(AbstractProfileService.java:306)
at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:271)
at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:461)
at org.jboss.Main.boot(Main.java:221)
at org.jboss.Main$1.run(Main.java:556)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.RuntimeException: failed to initialize bean container
at org.jboss.ejb3.EJBContainer.<init>(EJBContainer.java:253)
at org.jboss.ejb3.session.SessionContainer.<init>(SessionContainer.java:119)
at org.jboss.ejb3.session.SessionSpecContainer.<init>(SessionSpecContainer.java:69)
at org.jboss.ejb3.stateless.StatelessContainer.<init>(StatelessContainer.java:112)
at org.jboss.ejb3.Ejb3AnnotationHandler.getStatelessContainer(Ejb3AnnotationHandler.java:310)
at org.jboss.ejb3.Ejb3AnnotationHandler.getContainers(Ejb3AnnotationHandler.java:203)
at org.jboss.ejb3.Ejb3Deployment.deployElement(Ejb3Deployment.java:718)
at org.jboss.ejb3.Ejb3Deployment.deployElement(Ejb3Deployment.java:669)
at org.jboss.ejb3.Ejb3Deployment.deployUrl(Ejb3Deployment.java:651)
at org.jboss.ejb3.Ejb3Deployment.deploy(Ejb3Deployment.java:614)
at org.jboss.ejb3.Ejb3Deployment.create(Ejb3Deployment.java:491)
at org.jboss.ejb3.deployers.Ejb3Deployer.deploy(Ejb3Deployer.java:182)
... 33 more
Caused by: java.lang.IllegalStateException: Null beannMetaData
at org.jboss.ejb3.interceptors.metadata.BeanInterceptorMetaDataBridge.setupMetaDataLists(BeanInterceptorMetaDataBridge.java:315)
at org.jboss.ejb3.interceptors.metadata.BeanInterceptorMetaDataBridge.initialise(BeanInterceptorMetaDataBridge.java:235)
at org.jboss.ejb3.interceptors.metadata.BeanInterceptorMetaDataBridge.<init>(BeanInterceptorMetaDataBridge.java:138)
at org.jboss.ejb3.interceptors.metadata.AdditiveBeanInterceptorMetaDataBridge.<init>(AdditiveBeanInterceptorMetaDataBridge.java:48)
at org.jboss.ejb3.aop.BeanContainer.initialize(BeanContainer.java:194)
at org.jboss.ejb3.EJBContainer.<init>(EJBContainer.java:249)
... 44 more
Caused by: java.lang.NullPointerException
at org.jboss.ejb3.interceptors.metadata.BeanInterceptorMetaDataBridge.setupMetaDataLists(BeanInterceptorMetaDataBridge.java:268)
... 49 more
[/code]

I've only change that property because by default JBoss doesn't search my annotated EJB classes inside WEB-INF/classes.

Thank you very much