JMS Adapter Congiuration error

I’m trying to configure JMS adapter with weblogic7.0.
I am getting connection exception with no description.
What are values required with jndi/jms usernames/password for weblogic7.0.Currently i have given admin userid and passwd for jms and jndi details.
In jndi initial context i have given = weblogic.jndi.WLInitialContextFactory.
I have created required topic and connection factory in weblogic7.0. I have placed weblogic.jar in the lib file ; jndi,jms,rt and weblogic jars in the classpath of the adapter configuration.I’m using jdk1.4. Still i’m getting following error

Unable to establish a connection to the JNDI Provider using these connection properties: (Context.SECURITY_PRINCIPAL = admin, Context.SECURITY_CREDENTIALS =admin, Context.INITIAL_CONTEXT_FACTORY = weblogic.jndi.WLInitialContextFactory, Context.PROVIDER_URL = t3://100.400.43.56:7001 ). Provider error: javax.naming.CommunicationException exception is weblogic.socket.UnrecoverableConnectException .
The JMS tutorial also talks of LDAP.

Can anyone help in solving this problem