Using sockets from behind a proxy server

Hi.

I'm having trouble using a Socket class to connect to another server when I'm behind our corporate proxy server.  I'm getting an Exception detailing a "java.net.NoRouteToHostException: No route to host: connect" error.

The code I have is:


import java.io.*;
import java.net.*;
import util.*;

public class SocketTest
{
    public static void main(String[] args)
    {
        try
        {
            System.setProperty( "proxySet", "true" );
            System.setProperty( "http.proxyHost", "xx.xx.xx.xxx" );
            System.setProperty( "http.proxyPort", "xxxx" );

            /*
            URL url=new URL("http://xx.xx.xx.xxx");
            URLConnection uc = url.openConnection ();
            String encoded = new String(base64Encode(new String("userName:password")));
            uc.setRequestProperty("Proxy-Authorization", "Basic " + encoded);
            uc.connect();
             */

            System.setProperty( "http.proxyUser", "userName" );
            System.setProperty( "http.proxyPassword", "password" );
           
            Socket s = new Socket("time-A.timefreq.bldrdoc.gov", 13);
           
            BufferedReader in = new BufferedReader(
                new InputStreamReader(s.getInputStream()));
           
            boolean more = true;
           
            while(more)
            {
                String line = in.readLine();
                if (line == null)
                    more = false;
                else
                    System.out.println(line);
            }
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }
    }
}

Can't seem to get the thing to work.  I don't know if it's of any relevence but just spoke to an IT guy who said that the proxy server acts an authentication server..the actual websweeper box is on NT, where all the filtering happens.  I'm not too clued up on all of this proxy/firewall stuff so can anyone suggest anything I'm doing wrong?

Thanks in advance

batdan