WSIF inside JBoss Application Server not working

Hi All,

I'm experiencing strange problems with running WSIF JMS client inside a 
jboss application server.
Status Quo: I have two jboss instances running on one physical server 
(suse linux 9.3, java1.5) - each jboss instance has a
defined queue and a WSDL file describing methods, messages and finally 
the JNDI name and jnp host (jnp://localhost:1099, jnp://localhost:1199).

When I use the wsif client remotely or directly on the linux server - 
OUTSIDE jboss - everything works fine. When I try to use the client 
INSIDE the jboss
e.g. ejb oder web-application I'm getting the following message:

-----------------LOG---------------
20:23:11,194 ERROR [wsif] WSIF0005E: An error occurred when invoking the 
method 'indexDocuments'. ('Jms')
20:23:11,195 ERROR [UIMAEndpointBean] org.apache.wsif.WSIFException: 
org.apache.wsif.providers.jms.WSIFOperation_Jms@17ecdf0 : Could not 
invoke 'indexDocuments'; nested exception is:
        org.apache.wsif.WSIFException: WSIF Jms support caught 
'javax.jms.InvalidDestinationException: This destination does not exist! 
QUEUE.CeCoreQueue' linked exception 'null'
-----------------LOG---------------

I'm trying to send that message between those 2 jboss instances ... the 
queue is up and running ...

Whats the deal with running a WSIF JMS client inside a container?

Thanks for your help

Hannes