The "Range" option in QHttpRequestHeader

Code:

#include <QtCore/QCoreApplication>
#include <qtGUI/QMessageBox>
#include <QHttp>
#include <QHttpRequestHeader>
#include <QFile>
#include <QFileInfo>
#include <QUrl>
int main(int argc, char *argv[])
{
	QCoreApplication a(argc, argv);//_______
	QString qsUrlLink = "http://cpowone.com/Embedded%20Systems.rar";
	QFileInfo qfFileInfo(qsUrlLink);
	QString qsFileName = qfFileInfo.fileName();
	if (qsFileName.isEmpty())
		qsFileName = "index.html";
	QUrl quSubjectUrl(qsUrlLink);
	QHttp *hHttp = new QHttp();
	QHttpRequestHeader *qhHeader = new QHttpRequestHeader("GET", quSubjectUrl.path());
	QString qsHost = quSubjectUrl.host();
	qhHeader->setValue("Host", qsHost);
	qhHeader->setValue("Content-Range", QString("bytes=1-1024"));
	hHttp->setHost(qsHost, 80);
	QFile *qfFileOut;
	qfFileOut = new QFile(qsFileName);
	if(!qfFileOut->open(QIODevice::WriteOnly)){
		delete qfFileOut;
		qfFileOut = 0;
		return 0;
	}
	hHttp->request(*qhHeader,0,qfFileOut);
	return a.exec();
}

i download file on internet but it error beacause it cant download form http://cpowone.com/Embedded%20Systems.rar
can you help me ?

http://c.upanh.com/upload/5/367/CS0.9522995_1_1.png