I am using a Brother MFC 6800 Scanner and I am unable to scan with it and also getting error message that states "unable to communicate with twain device." The scanner is able to start but then it will stop and hang for about half a page. Normally, the Acrobat and Paperport applications hang in it. And when the applications are close then the scanner will come alive again and then gives out rest of scan job but without scanning. This printer-scanner is well connected to the computer via usb. I have recently installed Microsoft Office 2007 and Adobe Acrobat reader 6 and updated it as well. Can anyone help me please.