How to connect to a JMS Server/Provider?

Hello!

I use Sun Java Application Server included with J2EE 1.4. I have started the default server and created Connection Factory with JNDI name:
jms/QueueConnectionFactory
and a Destination Resources with JNDI name:   
jms/Queue

I have set the members in SampleUtillitis like:
    public static final boolean USE_JNDI = true;
    public static final String  QUEUECONFAC = "jms/QueueConnectionFactory";


When try to run the SenderToQueue sample but I just get this error: 

Could not create JNDI context: javax.naming.ServiceUnavailableException: inv1437
.xxx.xxx.com:7676; socket closed

If I run a netstat -a I can see this on port 7676:
TCP    inv1437:7676          inv1437.xxx.xxx.com:3016  TIME_WAIT

To me this looks like there is a service availible on 7676.

The port 7676 seems to be right since it is specified in the Sun Java Application Server under default_JMS_host to 7676.

Perhaps it is something wrong with the url that I need to include any user or password or something.
java.naming.provider.url=ldap://inv1437.xxx.xxx.com:7676/

Or perhaps my server is not running in the correct way that I think?

So if you got any ideas please let me know.

Best regards
Fredrik