including the database backup to the deployment project

While deploying an app for estate management agents which I built, I backed up and included the mssql database in the deployment project (specifically in the Application folder of the File System Editor and in the Debug folder of the deployment folder). I was happy when I tried signing into the app on the system in which I designed it. However, I have not been able to sign into the app using the same "username" and "password" in a different system from the one I sued to design the app. How can I solve this problem

re: including the database backup to the deployment project

Is the database installed on the target machine ?