the stack error:
15:59:09,062 ERROR [AbstractKernelController] Error installing to Real: name=vfszip:/D:/projectfoldername/jboss/jboss-5.1.0.GA/server/default/deploy/.ear file / state=PreReal mode=Manual requiredState=Real
org.jboss.deployers.spi.DeploymentException: Error deploying model.jar: LEntityManager;
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.doInstallParentFirst(DeployersImpl.java:1210)
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$1.run(Main.java:556)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NoClassDefFoundError: LEntityManager;
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2291)
at java.lang.Class.getDeclaredFields(Class.java:1743)
at org.jboss.aop.Advisor.doDeployAnnotationOverride(Advisor.java:455)
at org.jboss.aop.Advisor$DeployAnnotationOverrideAction$2.deploy(Advisor.java:2021)
at org.jboss.aop.Advisor.deployAnnotationOverride(Advisor.java:416)
at org.jboss.aop.Advisor.deployAnnotationOverrides(Advisor.java:400)
at org.jboss.aop.ClassAdvisor.rebindClassMetaData(ClassAdvisor.java:1225)
at org.jboss.ejb3.interceptors.container.ManagedObjectAdvisor.rebindClassMetaData(ManagedObjectAdvisor.java:180)
at org.jboss.aop.ClassAdvisor$1.run(ClassAdvisor.java:292)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.aop.ClassAdvisor.attachClass(ClassAdvisor.java:276)
at org.jboss.ejb3.interceptors.container.ManagedObjectAdvisor.initialize(ManagedObjectAdvisor.java:174)
at org.jboss.ejb3.aop.ExtendedManagedObjectAdvisor.initialize(ExtendedManagedObjectAdvisor.java:70)
at org.jboss.ejb3.interceptors.container.AbstractContainer.initializeAdvisor(AbstractContainer.java:162)
at org.jboss.ejb3.aop.BeanContainer.initialize(BeanContainer.java:206)
at org.jboss.ejb3.EJBContainer.<init>(EJBContainer.java:249)
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)
... 34 more
Caused by: java.lang.ClassNotFoundException: EntityManager
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:292)
at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1119)
at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:798)
at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:441)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 62 more
15:59:09,234 ERROR [ProfileServiceBootstrap] Failed to load profile: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS):
DEPLOYMENTS IN ERROR:
Deployment "vfszip:/D:/projectfoldername/jboss/jboss-5.1.0.GA/server/default/deploy/.ear file/" is in error due to the following reason(s): java.lang.ClassNotFoundException: EntityManager
15:59:09,312 INFO [Http11Protocol] Starting Coyote HTTP/1.1 on http-127.0.0.1-8080
15:59:09,375 INFO [AjpProtocol] Starting Coyote AJP/1.3 on ajp-127.0.0.1-8009
15:59:09,375 INFO [ServerImpl] JBoss (Microcontainer) [5.1.0.GA (build: SVNTag=JBoss_5_1_0_GA date=200905221053)] Started in 2m:24s:391ms
请帮助，因为我已将javaee.jar放在lib文件夹中，jar也存在于项目的buildpath中。为什么这个错误给出，我无法配置。任何帮助将不胜感激。