Hi. Just started new gig and installed the office printer driver (Brother MFC-9970CDW) supposedly compatible with my OS 10.4.11, which seemed to go fine. But now when I try and print a document -- any document -- the print dialogue box simply doesn't appear. I receive no other notifications. Just nothing happens. Period. Can someone suggest what I might have done wrong? I'm trying to connect to the printer via the in-house wireless network. Thank you very much.