You seem to be having lots of problems just using the correct table and column names in your database. Please check and double check that you are using the same file for each test. This is not something that we can do for you. You can use the SQLite command line interface (sqlite3.exe) to check the schema, and content of any file.
The following commands in sqlite3 will get the information you need.
sqlite3 <name of your database file>
.tables <-- list all tables in this database
.schema <table name> <-- list the schema for the specified table