Running Weblogic8.1 with sp6 an exception when try to deploy the application through the gui console its an ear file.

<Failures were detected while initiating Deploy task for application EarFile.>
<Aug 24, 2011 6:32:12 AM GMT> <Error> <Deployer> <BEA-149201> <Failed to complete the deployment task with ID 0 for the application EarFile.
java.lang.NoClassDefFoundError: org/springframework/ejb/support/AbstractStatelessSessionBean
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:476)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:181)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:223)
at weblogic.ejb20.deployer.EJBModule.setupEJBToImplClassDependencies(EJBModule.java:1010)
at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:460)
at weblogic.j2ee.J2EEApplicationContainer.prepareModule(J2EEApplicationContainer.java:2847)
at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.java:1534)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1188)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1031)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareContainer(SlaveDeployer.java:2634)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2584)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2506)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:833)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:542)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:500)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
--------------- nested within: ------------------
weblogic.management.ManagementException: - with nested exception:
[java.lang.NoClassDefFoundError: org/springframework/ejb/support/AbstractStatelessSessionBean]
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2523)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:833)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:542)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:500)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
>