Please help with subscribe/notify

[David Novice]

Following the thread on this list, "Subscribing for event notification", 
I've attempted to create similar code that will subscribe using tomcat 
server.
I get an error during the notificationListener.subscribe() call like this:

"Feb 24, 2005 12:18:31 PM org.apache.webdav.lib.NotificationListener 
subscribe
SEVERE: Subscription for uri='calendars/dnovice' failed. State: 501"

Is this supposed to work? Any pointers to how to debug this for more 
information?

Here's my code:
    NotificationListener nl = new NotificationListener( "localhost", 3500,
        "vpn9.cisco.com", 8080,
        Protocol.getProtocol("http"),
        creds, "/webdav",60, true ); // 60 is just in case of UDP failure.
  
      nl.subscribe( "Update/newmember",
        "calendars/dnovice",
        DepthSupport.DEPTH_1,
        3600,
        86400,
        new Subscriber() {
            public void notify(String uri, Map information) {
                System.out.println("Event occured : " + uri  );
            }
        },
        creds );

---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]