JXTA - Internet

Estou tentando buscar o advertisement de um peer rendezvouz especificado no NetworkConfigurator mas não tenho retorno.
Alguem sabe me dizer o que está errado?

[code]
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import net.jxta.discovery.DiscoveryEvent;
import net.jxta.discovery.DiscoveryListener;
import net.jxta.discovery.DiscoveryService;
import net.jxta.exception.PeerGroupException;
import net.jxta.peergroup.PeerGroup;
import net.jxta.platform.NetworkConfigurator;
import net.jxta.platform.NetworkManager;

public class Discovery implements DiscoveryListener {

public void run() throws URISyntaxException, PeerGroupException, IOException
{
    NetworkManager manager = new NetworkManager(NetworkManager.ConfigMode.ADHOC, "EchoServer",
            new File(new File(".cache"), "EchoServer").toURI());

    NetworkConfigurator config = manager.getConfigurator();

    config.setTcpEnabled(true);
    config.setTcpIncoming(true);
    config.setTcpOutgoing(true);

    config.setHttpEnabled(true);
    config.setHttpIncoming(true);
    config.setHttpOutgoing(true);

    config.addRdvSeedingURI(new URI("http://192.18.37.36:9700"));
    config.addRelaySeedingURI(new URI("tcp://192.18.37.36:9701"));

    config.save();

    manager.startNetwork();

    PeerGroup netPeerGroup = manager.getNetPeerGroup();

    DiscoveryService discovery = netPeerGroup.getDiscoveryService();

    discovery.addDiscoveryListener(this);

    discovery.getRemoteAdvertisements(null, 2, null,
        netPeerGroup.getPeerGroupID().toString(),
        0, this);

    try {
        Thread.sleep(5000);
    } catch (InterruptedException interruptedException) {
        interruptedException.printStackTrace();
    }

    manager.stopNetwork();
    System.exit(0);
}

public static void main(String[] args) throws IOException, URISyntaxException, PeerGroupException {
    
    new Discovery().run();
}

public void discoveryEvent(DiscoveryEvent arg0) {
    System.out.println("here");
}

}[/code]