One part of that descriptor fragment needs to be applied to the "enterprise-beans node of the ejb-jar.xml" and the other section goes down further in that file in the "assembly-descriptor node". If that was followed, please attached your ejb-jar.xml file.
Here you need add your QCF and queue name replacing MQ details, let me know if you still face issue.
and which mode you are trying to process the message is it Container Managed or Bean Managed? if container managed you need to check the container Based check box in MDBListener rule form in the provided information it is mentioned as false i.e