ofxSQLite on iOS - unable to open database file

Hello everybody,
I’m creating a little game using OF iphone. I just downloaded roxlu’s ofxSQLite addon. I included it in my application but the app is not starting, giving the following error:
unable to open database file Program ended with exit code: 1
coming from the initialization happening in the file ofxSQLite.cpp.
I tried to create an empty file with the same name I call, like “test.db”, in my bin/data folder. I also tried to change permissions to all read and write.
I’d appreciate any help.
Thank you!