Need help with the creation of Mac installer package with the local database. (Mac OSx, Xcode)

Need a little work. I have a finished project. All works in Xcode. But, when I make the installer package, and after installation this package - there is no connection to the local database (SQLite). It is not possible to add anything in app to database. Help solve this problem? Maybe we need some additional settings in Xcode (v.5.0.2) or in my source code..