i made a request to http://yandex.ru/yandsearch?text=123&lr=213 with proxy

Qt Code: 
  1. {
  2.         proxy.setType(QNetworkProxy::HttpProxy);
  3.         proxy.setHostName(QString("46.42.44.212"));
  4.         proxy.setPort(3128);
  5.         QNetworkProxy::setApplicationProxy(proxy);
  6. }
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and qwebview

Qt Code: 
  1. MyNetworkAccessManager *nam = new MyNetworkAccessManager();
  2. nam->setCookieJar(new QNetworkCookieJar());
  3. ui->webView->page()->setNetworkAccessManager(nam);
  4.  
  5. QWebSettings::globalSettings()->setAttribute(QWebSettings::AutoLoadImages, true);
  6. QWebSettings::globalSettings()->setAttribute(QWebSettings::JavaEnabled, true);
  7. QWebSettings::globalSettings()->setAttribute(QWebSettings::JavascriptEnabled, true);
  8. QWebSettings::globalSettings()->setAttribute(QWebSettings::PluginsEnabled, true);
  9.  
  10. ui->webView->page()->setLinkDelegationPolicy(QWebPage::DelegateAllLinks);
  11.  
  12. ui->webView->setUrl(QUrl("http://yandex.ru/yandsearch?text=123&lr=213"));
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for cookies i have my MyNetworkAccessManager in createRequest(Operation op, const QNetworkRequest &request, QIODevice *outgoingData)

Qt Code: 
  1. if(static_cast<QNetworkRequest::LoadControl>request.attribute(QNetworkRequest::CookieLoadControlAttribute, QNetworkRequest::Automatic).toInt()) == QNetworkRequest::Automatic)
  2.    {
  3.        if (this->cookieJar())
  4.        {
  5.            QList<QNetworkCookie> cookies = this->cookieJar()->cookiesForUrl(request.url());
  6.            if (!cookies.isEmpty())
  7.            {
  8.                myReq.setHeader(QNetworkRequest::CookieHeader, qVariantFromValue(cookies));
  9.            }
  10.        }
  11.    }
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and always get same error

Qt Code: 
  1. "error string: Operation canceled" 
  2. "error url: http://yandex.ru/showcaptcha?retpath=http://yandex.ru/yandsearch?text=123&lr=213&t=0/1314734922/b029d1247fd1f0e0111636a2a04cc9f9&cc=1&" 
  3. "error status code:200"
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where is the problem? i get html web page with error and nothing display