You might want to check the manual for that but I seem to recall that most multifunction printers do not allow the Single Button scan in OS X.
I have installed a Brother inkjet printer/fax (MFC-240C) to my MacBook Pro (10.2.8) and it prints beautifully. The question is this - I am attempting to scan a book cover by pressing the scan facility on the printer and I can see it downlaoding onto my Mac but then .... where do I find it???
Nothing appears on my desktop.
Thanks for any enlightenment.