🚀 go-pugleaf

Hi,
I have the following code to implement drag-and-drop onto a JFrame.

 //inner class to handle DropTargetEvents
  private class DropTargetHandler implements DropTargetListener {
    //handle drop operation
    public void drop( DropTargetDropEvent event) {
      //get dropped Transferable object
      Transferable transferable = event.getTransferable();
      //get dropped object's DataFlavors
      DataFlavor[] dataFlavours = transferable.getTransferDataFlavors();

      //process drops for supported types
      for (int i = 0; i < dataFlavours.length; i++) {
          DataFlavor dataFlavour = dataFlavours[i];

          //if text is dropped
          if (dataFlavour.equals(DataFlavor.stringFlavor)) {
            event.acceptDrop(DnDConstants.ACTION_COPY);
            String string = transferable.toString();
            event.dropComplete(textArea.dropText(string));
          }
          //if a file is dropped
          else if (dataFlavour.isFlavorJavaFileListType()) {
            event.acceptDrop(DnDConstants.ACTION_COPY);
            event.dropComplete(dropImage(transferable));
          }
          else
            event.rejectDrop(); //otherwise do nothing
       }
    }

My problem is that if I set a breakpoint within the drop method, and drop
some text onto the JFrame, the Java app and JBuilder both freeze completely.
I can see the variables in the debugging pane, but can't access them or stop
the app.
I have to use Task Manager to kill the Java process, which then allows me
back into JBuilder. The same problem does not occur if I run the app
normally.

Can anybody help me, or should I look at upgrading my JBuilder?

Thanks,
Eoin