why qtnetworkaccessmanager don't go to authenticationRequired

[sliverTwist]

I am creating an application that is mentioned to connect to an instance of on owncloud server but i can't find why it doesn't connect to the server .Instead of that the reply i get to the login screen and i get the html code for it

this is the code responsible for the connection

//the network request and reply
QNetworkAccessManager * manager = new QNetworkAccessManager();
QUrl url (url1);
manager->get(QNetworkRequest(url));
connect(manager, SIGNAL(authenticationRequired(QNetworkReply*,QAuth enticator*)),
SLOT(provideAuthenication(QNetworkReply*,QAuthenti cator*)));
connect(manager, SIGNAL(finished(QNetworkReply *)),
this, SLOT(result(QNetworkReply *)));

the reply code:

void Login::result(QNetworkReply *reply)
{
reply->deleteLater();

if(reply->error() == QNetworkReply::NoError) {
// Get the http status code
int v = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute ).toInt();
if (v >= 200 && v < 300) // Success
{
qDebug()<<"Here we got the final reply";
QString replyText = reply->readAll();
qDebug()<<replyText;
}
else if (v >= 300 && v < 400) // Redirection
{
qDebug()<<"Get the redirection url";
QUrl newUrl = reply->attribute(QNetworkRequest::RedirectionTargetAttrib ute).toUrl();
// Because the redirection url can be relative,
// we have to use the previous one to resolve it
newUrl = reply->url().resolved(newUrl);

QNetworkAccessManager *manager = reply->manager();
QNetworkRequest redirection(newUrl);
QNetworkReply *newReply = manager->get(redirection);
QString replyText = newReply->readAll();
qDebug()<<replyText;
return; // to keep the manager for the next request
}
}
else
{
// Error
qDebug()<<reply->errorString();
}

reply->manager()->deleteLater();
}
could you help me figure out why i get the login screen instead of authentication ?