Deployment Descriptor not found?!

Hi,

during deployment of my app I am running into an exception all the time:

[EJB:011113]Error: The Message Driven Bean 'MyBean' does not have a message
destination configured. The message destination must be set using a
message-destination-link, destination-resource-link, destination-jndi-name or a
resource-adapter-jndi-name.

In my deployment descriptor I have:

[pre]<weblogic-ejb-jar xmlns="http://www.bea.com/ns/weblogic/10.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.bea.com/ns/weblogic/10.0
http://www.bea.com/ns/weblogic/10.0/weblogic-ejb-jar.xsd">

	<description>No Description</description>
	<weblogic-enterprise-bean>
		<ejb-name>MyBean</ejb-name>
		<message-driven-descriptor>
			<destination-jndi-name>
				aa.jms.queues.triggerloading
			</destination-jndi-name>
		</message-driven-descriptor>
[...]
	</weblogic-enterprise-bean>
</weblogic-ejb-jar>
[/pre]

So destination-jndi-name is set... why does this error appear? 

As I am new to EJB and Weblogic, how can I make sure the Deployment Descriptor
is used? the syntax of the descriptor seems correct as I checked it with a XML
tool. It seems to me the descriptor is ignored but I am not sure...

I am using WLS 10.0