QWebView and set QNetworkCookieJar

[Talei]

Hello,
I have QWebView and I want to set received earlier QNetworkCookieJar, but the problem is that it don't work.

The problem is that I use code like:

QNetworkAccessManager *netMenag = new QNetworkAccessManager( this );
    netMenag->setCookieJar( jar );
       ui->webView->page()->setNetworkAccessManager( netMenag );

QNetworkAccessManager *netMenag = new QNetworkAccessManager( this );
    netMenag->setCookieJar( jar );
       ui->webView->page()->setNetworkAccessManager( netMenag );

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jar is QNetworkCookieJar retrieved earlier from source web, and I want set it to the WebWiev.

Any help is more then appreciate.
Best regards.