Xml : setting schema and namespace details

[Madhumitha Baskaran]

Hi...
I generated my xml using Marshaller class of castor. But my xml is missing namespace and schemaloctaion details.
How do i set them while generating the xml in castor?
i used
marshaller.setSchemLocation("http://......");
marshaller.setNamespaceMapping("","http:/.....");

But schema and namespace details are not found in the xml. Do i need to set any property as true?

Thanks