Out of the blue, Sage Act 2012 Pro (on a secondary machine, using a shared database) suddenly stopped working. Got the error (above). Researched this on Sage, did what they suggested: (a) reinstalled the .PAD file, no luck; (b) uninstalled Microsoft SQL server, and reinstalled (2008 R2), and did the same for ACT. Still no luck. Only clue I have is in the SQL database configuration panel, it won't show the ACT database, so it's not finding it, but can't figure out how to change this ... and how it got messed up to begin with, as we've changed nothing here. Any ideas?