Service error and java:/managedEntityFactories

[lutfi123456]

I make some program like this

import org.jboss.annotation.ejb.Management;
import org.jboss.annotation.ejb.Service;

@Service(objectName="segl:service=TaskContainerJMXMBean")
@Management(TaskContainerJMX.class) //give me error in this line with this attribute is not defined in Management
public class TaskContainerJMXMBean implements TaskContainerJMX {
String workingDirectory = "";

public void setWorkflowDirectory(String directory) {
workingDirectory = directory;
}

public void create() throws Exception {
System.out.println ("Create");
}

public void start() throws Exception {
System.out.println ("Start");
}

public void stop() throws Exception {
System.out.println ("Stop");
}

public void destroy() throws Exception {
System.out.println ("Destroy");
}

}

and if I erased that interface.class and I deployed in JBoss4.0.3SP1, then it gave me this error

09:16:47,839 WARN [ServiceController] Problem starting service jboss.j2ee:service=EJB3,name=edu.hlrs.segl.sb.TaskContainerBean
java.lang.RuntimeException: unable to find: java:/managedEntityFactories/SEGL
at org.jboss.ejb3.injection.PersistenceContextHandler.getManagedEntityMa
nagerFactory(PersistenceContextHandler.java:85)
at org.jboss.ejb3.injection.PersistenceContextHandler.loadFieldInjectors
(PersistenceContextHandler.java:169)
at org.jboss.ejb3.injection.PersistenceContextHandler.loadInjectors(Pers
istenceContextHandler.java:134)
at org.jboss.ejb3.EJBContainer.resolveInjectors(EJBContainer.java:397)
at org.jboss.ejb3.EJBContainer.initializePool(EJBContainer.java:330)
at org.jboss.ejb3.EJBContainer.start(EJBContainer.java:283)
at org.jboss.ejb3.SessionContainer.start(SessionContainer.java:48)
at org.jboss.ejb3.stateless.StatelessContainer.start(StatelessContainer.
java:63)
at org.jboss.ejb3.stateless.StatelessManager.startService(StatelessManag
er.java:93)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanS
upport.java:274)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMB
eanSupport.java:230)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)

what kind of error is this?

thanks before for your help