Firefox Browser stuck when droping link to QMainWindow

[umen242]

I have simple drag and drop functions implemented in QmainWindow the reference taken
from "here":http://sector.ynet.sk/qt4-tutorial/dnd.html
and
"here":http://developer.qt.nokia.com/wiki/Drag_and_Drop_of_files
all i want to do is to accept valid url and open QDialog when the url dropped .
but when the url drooped and the QDialog poped up the browser is stuck in the background until i close the QDialog . this is wrong the browser should be free all the time.
here is my code :

@void MainWindow::dragMoveEvent(QDragMoveEvent *event)
{

 if (event->mimeData()->hasFormat("text/html")) 
  {  
  event->acceptProposedAction();
  }
 else
 {
  event->ignore();
 }
}
void MainWindow::dragEnterEvent(QDragEnterEvent *event)
{
 // accept just text/uri-list mime format
 if (event->mimeData()->hasFormat("text/html"))
  {  
  event->acceptProposedAction();
  } 
 else
 {
  event->ignore();
 }
}
void MainWindow::dragLeaveEvent(QDragLeaveEvent *event)
{
   
     event->accept();

 
}
void MainWindow::dropEvent(QDropEvent *event)
{
 QList<QUrl> urlList;
 QString fName;
 QStringList pathList;
 QFileInfo info;
 QString suffix;
    
  if (event->mimeData()->hasFormat("text/html"))
  {
   urlList = event->mimeData()->urls(); // returns list of QUrls
   // if just text was dropped, urlList is empty (size == 0)
   
   if ( urlList.size() > 0) // if at least one QUrl is present in list
   {
     QString url = urlList.at(0).toString();
     event->acceptProposedAction();
     openDialog(url); // THIS IS THE FUNCTION THAT I OPEN THE QDIALOG window 
     
      
   }
  }
  //event->acceptProposedAction();
}

void MainWindow::openDialog(QString& slink)
{
 
  QHash<QString,QVariant> DataMap;    
  QString link = slink;
  DataMap.insert("m_webpage",link);
   
  PublishToDialog* pPublishToDialog = new PublishToDialog(this);
  pPublishToDialog->Init(DataMap);
  if(pPublishToDialog->exec&#40;&#41; != QDialog::Accepted)
  {
      
  }
}@