java ee application migrating from oc4j to weblogic, get error SessionBean

I am migrating a project from OC4J server to Weblogic. It uses an ejb-jar.xml file and Spring framework AbstractStatelessSessionBean implementation. I get an error:

 SessionBean MessagingManager implements SessionBean interface, but PreDestroy callback hasn't been applied to the ejbRemove method

I googled this, and found absolutely nothing. The MessagingManager in question has the PreDestory annotation in a cleanUp() method not the ejbRemove method (I'm guessing because AbstractStatelesSessionBean is implemented).

Here's some code:

public class MessagingQueueManagerImpl extends AbstractStatelessSessionBean
    implements AppMessagingManager {
//blah 

@Override
// Use Spring DI
protected void onEjbCreate() throws CreateException {
    //spring injection variables
    }
}

 @PreDestroy
public void cleanUp() {
    //blah
}

Why is the @PreDestory annotation set on the cleanUp method instead of the ejbRemove method and it worked in OC4J but not Weblogic? I made no changes to the code, only put the ear file into weblogic.