httpclient取不到cookie

最近需要做一个抓取的功能
http://17track.net/Index.htmlRB373021971HK里边的查询是通过ajax查询的
使用浏览器访问http://17track.net/Index.html的时候,使用httpwatch看不到是何时获取到cookie的,只看到一会就sent cookie了,没有看到received cookie.不知道有没有人遇到这样的事情?
使用httpclient访问http://17track.net/Index.html这个地址也是没有获取到cookie.
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.methods.GetMethod;
public class XCD { /**
 * @param args
 */
public static void main(String[] args) {
// TODO Auto-generated method stub
HttpClient client = new HttpClient();
List<Header> headers = new ArrayList<Header>();  
headers.add(new Header("Host","17track.net"));
headers.add(new Header("User-Agent","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; CIBA; .NET4.0C; .NET CLR 2.0.50727)"));
headers.add(new Header("Accept","image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/QVOD, application/QVOD, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/xaml+xml, application/x-ms-xbap, application/x-ms-application, */*"));
headers.add(new Header("Accept-Language","zh-cn"));
headers.add(new Header("Accept-Encoding","gzip, deflate,utf-8"));
headers.add(new Header("Accept-Charset","GB2312,utf-8;q=0.7,*;q=0.7"));
headers.add(new Header("Connection","Keep-Alive"));

client.getHostConfiguration().getParams().setParameter("http.default-headers", headers);    GetMethod method2 = new GetMethod("http://17track.net/Index.html");
method2.getParams().setCookiePolicy(CookiePolicy.DEFAULT); 
try {
System.out.println(client.executeMethod(method2));
//System.out.println(method2.getResponseBodyAsString());
System.out.println(client.getState().getCookies().length);
} catch (HttpException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}}