Why QPageSetupDialog doesn't configure QPrinter correctly?

Hi all, I'm using Qt4.1.1 on WindowsXP. I call to QPageSetupDialog with a QPrinter pointer and I set the page orientation to Landscape. But when I generate a PDF document using this printer, the page is with portrait orientation. Is it a kind of bug caused because the dialog is the native from the system?

http://www.trolltech.com/developer/t...entry&id=83932
http://www.trolltech.com/developer/t...ntry&id=103453

Can u please tell me how to read Orientation information from QPageSetupDialog ? please help me..
Thanks in advance.