On deleting of an entity EJB, I get always an error: "Could not remove timer service
org.jboss.mx.util.MBeanProxyCreationException: Object name jboss.ejb:service=EJBTimerService not found: javax.management.InstanceNotFoundException: jboss.ejb:service=EJBTimerService is not registered." with exception stack trace. The entity will be removed from the database.

What can I do to resolve this problem?

JBoss 4.0.2.