Proxy not working in HttpClient 4.0 beta2

I am using HttpClient 4.0-beta2

to make REST calls. It works fine on my laptop, but in uni we have to configure our application to proxy, otherwise we will not be able to connect to the internet

Here is my original code:

HttpClient httpclient = new DefaultHttpClient();
HttpPut put = new HttpPut("http://" + PutBlob.ACCOUNT + 
                                      ".blob.core.windows.net/container/abc");
put.addHeader(PutBlob.ContentType, PutBlob.CONTENT_TYPE.TEXT_PLAIN.getValue());
put.setEntity(new StringEntity("Hello world", "UTF-8"));
Sign(put, PutBlob.ACCOUNT, PutBlob.KEY);

log.debug(EntityUtils.toString(httpclient.execute(put).getEntity()));

      

        
        
        
      

    

And below shows how I am using a proxy but it didn't work for me.

What is the correct way to configure a proxy in HttpClient 4.0

?

HttpHost hcProxyHost = new HttpHost("proxyserver", 3128, "http");
DefaultHttpClient httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, hcProxyHost);

HttpPut put = new HttpPut("/container/abc");
put.addHeader(PutBlob.ContentType, PutBlob.CONTENT_TYPE.TEXT_PLAIN.getValue());
put.setEntity(new StringEntity("Hello world", "UTF-8"));
Sign(put, PutBlob.ACCOUNT, PutBlob.KEY);

HttpHost target = new HttpHost( PutBlob.ACCOUNT + ".blob.core.windows.net");
log.debug(EntityUtils.toString(httpclient.execute(target, put).getEntity()));