QnetworkReply error - Symbian Qt

Question

I have the following piece of code.

  QNetworkAccessManager *man = new QNetworkAccessManager(this);

    QNetworkRequest getRequest;
    getRequest.setUrl((QUrl)requestUrl);

    m_svcReply = man->get(getRequest);
    connect(m_svcReply, SIGNAL(finished()),this, SLOT(getWebRequestFinished()));
    connect(m_svcReply, SIGNAL(error(QNetworkReply::NetworkError)),this, SLOT(webrequestFailed(QNetworkReply::NetworkError)));

If I'm executing this request over WIFI, I get a proper response from the server. However if I'm executing this request over 3G, I get a protocol "" is unknown error.

Any ideas why this might be happening?

Thanks