Qt QNetworkAccessManager 运行报错 ?报错

源码编译通过，但运行时出现错误，程序直接退出。  谢谢！

我的环境是 win7 - 64bit .  错误信息如下：

Starting E:\qt_Workspace\Modules\Network\build-Http-Desktop_Qt_5_2_0_MinGW_32bit-Debug\debug\Http.exe...
Auto configuration failed
180:error:02001015:system library:fopen:Is a directory:.\crypto\bio\bss_file.c:126:fopen('g:/phpbuild/apps_install/openssl.cnf','rb')
180:error:2006D002:BIO routines:BIO_new_file:system lib:.\crypto\bio\bss_file.c:131:
180:error:0E078002:configuration file routines:DEF_LOAD:system lib:.\crypto\conf\conf_def.c:199:
QMutex: destroying locked mutex
E:\qt_Workspace\Modules\Network\build-Http-Desktop_Qt_5_2_0_MinGW_32bit-Debug\debug\Http.exe exited with code 1

源码如下：

widget.h:

#ifndef WIDGET_H
#define WIDGET_H

#include <QtNetwork>

#include "ui_form.h"

class Widget :public QWidget, public Ui::Form
{
    Q_OBJECT

public:
    Widget(QWidget *parent =0);

private slots:
    void replyFinished(QNetworkReply *reply);

private:
    QNetworkAccessManager *manager;
    Ui::Form *ui;

};


#endif // WIDGET_H

#include "widget.h"

Widget::Widget(QWidget *parent)
    :QWidget(parent)
{
    setupUi(this);

    manager = new QNetworkAccessManager(this);

    connect(manager,SIGNAL(finished(QNetworkReply*)),
            this,SLOT(replyFinished(QNetworkReply*)));
    manager->get(QNetworkRequest(QUrl("http://www.sina.com.cn")));
}

void Widget::replyFinished(QNetworkReply *reply)
{
    QTextCodec *codec = QTextCodec::codecForName("utf8");
    QString all = codec->toUnicode(reply->readAll());
    ui->textBrowser->setText(all);
    reply->deleteLater();
}

#include <QApplication>
#include "widget.h"

int main(int argc,char *argv[])
{
    QApplication app(argc,argv);

    Widget widget;
    widget.show();

    return app.exec();
}