connection exception...

[mustang india]

Hi,
I am trying to get connected to a particular URL and download a file.
The code I am using is
url = new URL(_strUrl);
System.out.println("got connection");
System.setProperty("http.proxySet","true");
System.setProperty("http.proxyHost","167.56.256.240");
System.setProperty("http.proxyPort","8080");
BufferedReader in = new BufferedReader(
new InputStreamReader(
url.openStream()));
String line = "";
while((line = in.readLine()) != null) {
System.out.println(line);
}
in.close();
I get a connection exception stating that ther is a time-out. I am behind a fire wall.
Can anybody pl suggest what is the problem.