There is definitely something funky going on there. Where does AC store its DB connection string (SQL ConnectionString ? the DB Directory Path)? A Configuration file (i.e. AC.Config) would be the proper place to store such settings. Did tech support mention, or do anything with the DB configuration file settings while assisting your problem? I also, agree with the above posts from the other IT experts (James, Bert, and Sandeep).
Those guys give great advice. I believe they would be able to solve your problem with more detail on your end. From a developer?s point of view ? I?ll be more concerned with where?s the DB settings stored and how is it being called from startup of AC. I don?t think this is a major issue with other folks, so my advice probably wouldn?t be sufficient to your problem.
I do hope your problem is solved soon, without the reformatting and reinstalling of software.