buid.Stop(); ClientProtocolException cannot be cast to HttpResponseException

public String Stop() throws HttpResponseException, IOException{
 try {
 return client.get(url + "stop");
 }
 catch (IOException ex){
 if(((HttpResponseException)ex).getStatusCode() == 405)
 {
 stopPost();
 return "";
 }
 }
 return "";
 }

 java.lang.ClassCastException: org.apache.http.client.ClientProtocolException cannot be cast to org.apache.http.client.HttpResponseException
