Cookies not working

[daljit97]

Hello, I am working with a QGraphicsWebView and I've created a class for persistent cookies managment. But it don't work. Here's code.
@class PersistentCookieJar : public QNetworkCookieJar {
public:
PersistentCookieJar(QObject *parent) : QNetworkCookieJar(parent) { load(); }
~PersistentCookieJar() { save(); }

public:
void save()
{
QList<QNetworkCookie> list = allCookies();
QByteArray data;
foreach (QNetworkCookie cookie, list) {
if (!cookie.isSessionCookie()) {
data.append(cookie.toRawForm());
data.append("\n");
}
}
QSettings settings;
settings.setValue("Cookies",data);
}

void load()
{
    QSettings settings;
    QByteArray data = settings.value("Cookies").toByteArray();
    setAllCookies(QNetworkCookie::parseCookies(data));
}

};@

I've implemented it in this way.
@m_cookiejar = new PersistentCookieJar(this)
page()->networkAccessManager()->setCookieJar(m_cookiejar);@

Can someone help?