creation of new message Topic destinations in jboss5.0.0

I am not able to create destination in jboss to make a successful lookup
in %JBOSS_HOME'%\server\default\deploy\messaging\destinations-service.xml
i had given

<mbean code="org.jboss.jms.server.destination.TopicService"
name="jboss.messaging.destination:service=Topic,name=testTopic"
xmbean-dd="xmdesc/Topic-xmbean.xml">
<annotation>@org.jboss.system.deployers.managed.ManagementObjectClass(code=org.jboss.jms.server.destination.TopicServiceMO)</annotation>
<depends optional-attribute-name="ServerPeer">jboss.messaging:service=ServerPeer</depends>
<depends>jboss.messaging:service=PostOffice</depends>
</mbean>
the server startup has shown that has created the destination but my jndi lookup is failing

can anybody suggest how to configure destinations in jboss5.0.0 for a topic