I am scanning to a PDF file using Acrobat Pro XI 11.0.09 from either a Brother MFC-8480DN or HP Photosmart C4385 scanner and get a message: "Acrobat has stopped working". I am running OS Windows 7, 64bit. I previously had Acrobat Pro 9 and it worked great. I have not been able to get this new version of Acrobat Pro to work. I can open PDF documents, but the scanning is not working