Why am I getting last response if my server doesn't work?

Question

I use simple code to get XML content. but I have a trouble if my server doesn't work, I get last success response.

I tried all methods:

1. send every time another URI

2. setHeader Cache-Content How to prevent Android from returning a cached response to my HTTP Request?

3. I tried even HttpURLConnection with GET.

but nothing helps

DefaultHttpClient client = new DefaultHttpClient(); 
String fullPath = path + name;
HttpGet request = new HttpGet(fullPath);
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();

//....decode input string