open new window with current page's cookies session

[Bob Asm]

What else do I need to open the new page in another window with current page's session cookie? that new page requires authetication hence the need to pass the cookies, but something is missing, I guess, because the new page is redirected to login.
Here's my current createWindow overload:

QWebView *browserControl::createWindow(QWebPage::WebWindowType type)
{
    Q_UNUSED(type);
    QWebView *webView = new QWebView;
    webPage *newWeb = new webPage();
    newWeb->setNetworkAccessManager(this->page()->networkAccessManager());
    webView->setAttribute(Qt::WA_DeleteOnClose, true);
    webView->setPage(newWeb);
    webView->show();
    return webView;
}

[Konstantin Tokarev]

Sharing networkAccessManager between pages should be enough

Could you check what cookies were actually transmitted via WebInspector?