Problem in Http file upload

I am trying to upload a .csv file on my server. Referring the documentation, i have written the following code. But, there is some problem and it's not working.

I am calling doUpload() for the upload action:

Code:

uploadmanager::uploadmanager()
{
    connect(&manager, SIGNAL(finished(QNetworkReply*)),
            SLOT(uploadFinished(QNetworkReply*)));
}
 
 
void uploadmanager::doUpload()
{
    QStringList args;
    QString message_d = QString("Unable to open file");
    args<<"E:\\SMSAssassin\\spam_freq.csv";
 
    foreach (QString arg, args) {
 
       QFile file(arg);
       if (!file.open(QIODevice::ReadOnly))
       {
           QMessageBox::information(this, "Error", message_d);
           return;
       }
 
    QNetworkRequest request;
    request.setUrl(QUrl("http://ddd.myserver.com/smssp/uploads/"));
    request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded");
    file.open(QIODevice::ReadOnly);
    QByteArray fileBinaryData(file.readAll());
    file.close();
    QNetworkReply *reply = manager.put(request, fileBinaryData);
 
    currentUploads.append(reply);
}
 
}
 
void uploadmanager::uploadFinished(QNetworkReply *reply)
{
    //QUrl url = reply->url();
    if (reply->error())
    {
        QString message_er = QString("Error in Upload");
        QMessageBox::information(this, "Err", message_er);
    }
    else
    {
        QString message_d = QString("Upload Complete");
        QMessageBox::information(this, "Upload Complete", message_d);
 
    }
 
    currentUploads.removeAll(reply);
    reply->deleteLater();
 
    if (currentUploads.isEmpty())
        return;
 
}

Any help will be appreciated.