QHttp request problem on MAC Pro

[gamitkumar]

Hello Every one

i have developed an application for upload file to server on MAC pro.it works fine when i have login in computer in as Admin mode ...but System got crashes (KERNAL PANIC )when i login as parental account .......code is given below

QString fileName = filename;
		  QFile *userfile = new QFile(fileName);
          if ( !userfile->open(QIODevice::ReadOnly) )
          {
              QMessageBox::information(this, tr("HTTP"),
                                       tr("Unable to open the file %1: %2.")
                                       .arg(userfile->errorString()));
          }
 
          QHttpRequestHeader header("POST", "/macUpd.php",1,1);
          header.setValue("Host","192.168.100.161");
	  header.setValue("Content-type", "multipart/form-data, boundary=AaB03x");
          header.setValue("Cache-Control", "no-cache");
          header.setValue("Accept","*/*"); 
          QByteArray byt(fileName.toUtf8());
          QByteArray bytes;
          bytes.append("--AaB03x\r\n");
          bytes.append("content-disposition: ");
          bytes.append("form-data; name=\"uploadfile\"\r\n");
          bytes.append("\r\n");
          bytes.append("0\r\n");
          bytes.append("--AaB03x\r\n");
          bytes.append("content-disposition: ");
          bytes.append("form-data; name=\"uploadfile\"; filename=\"" + byt+ "\"\r\n");
          bytes.append("Content-Transfer-Encoding: binary\r\n");
          bytes.append("\r\n");
          bytes.append(userfile->readAll());
          userfile->close(); // the file is opened earlier in the code
          bytes.append("\r\n");
          bytes.append("--AaB03x--");
          int contentLength = bytes.length();
          header.setContentLength(contentLength);
	  http->request(header, bytes,0);

QString fileName = filename;
		  QFile *userfile = new QFile(fileName);
          if ( !userfile->open(QIODevice::ReadOnly) )
          {
              QMessageBox::information(this, tr("HTTP"),
                                       tr("Unable to open the file %1: %2.")
                                       .arg(userfile->errorString()));
          }
		  
          QHttpRequestHeader header("POST", "/macUpd.php",1,1);
          header.setValue("Host","192.168.100.161");
	  header.setValue("Content-type", "multipart/form-data, boundary=AaB03x");
          header.setValue("Cache-Control", "no-cache");
          header.setValue("Accept","*/*"); 
          QByteArray byt(fileName.toUtf8());
          QByteArray bytes;
          bytes.append("--AaB03x\r\n");
          bytes.append("content-disposition: ");
          bytes.append("form-data; name=\"uploadfile\"\r\n");
          bytes.append("\r\n");
          bytes.append("0\r\n");
          bytes.append("--AaB03x\r\n");
          bytes.append("content-disposition: ");
          bytes.append("form-data; name=\"uploadfile\"; filename=\"" + byt+ "\"\r\n");
          bytes.append("Content-Transfer-Encoding: binary\r\n");
          bytes.append("\r\n");
          bytes.append(userfile->readAll());
          userfile->close(); // the file is opened earlier in the code
          bytes.append("\r\n");
          bytes.append("--AaB03x--");
          int contentLength = bytes.length();
          header.setContentLength(contentLength);
	  http->request(header, bytes,0);

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is there any idea from u gye......why SYSTEM crashes when it run from parental account on MAC pro .

Thanks