You are using a peer to peer - Home Premium must actually log onto the server everytime they are rebooted, turned off, etc - what usually happens is someone tries to run AC before this and it cannot find the database - will run the setup utility and tell you to look for it. If you had pro versions then you would "log on" and it would remember that and not happen any more. This happens to everyone who uses "Home" in their "office". This is one of the reasons that some will tell you that you should never use the home version - you can but you can always get this problem potentially - will have to learn to deal with it. If you turn off your computers at night this will happen if you do not let your "server" come all the way on and log in before someone hits AC.....
