[NTG-context] Make page number appear on top of image

Hi, I want to combine some papers into a single pdf file "with page numbers". I am including the papers using \copypages[filename] However, the pagenumber is not printed when the paper is a scanned copy. I guess this is because the page number is printed and then the scanned image is printed on top of it, thereby hiding the page number. How can I force the page number to appear on top? Thanks, Aditya