Android : android.database.sqlite.SQLiteException: no such table: FTStable1 (code 1): , while compiling: SELECT idtable FROM FTStable1 ORDER BY name

I want to create a SQLite DB, and i get the error SQLiteException: no such table when i do the first SELECT. My app at first do a Select to know if the Table is empty and then call a WS online to get data to Insert.

Thanks for help.

The SELECT:

static private ItemsDbAdapter dbHelper;
....
dbHelper = new ItemsDbAdapter(getActivity());
dbHelper.open();
cursor = dbHelper.fetchAllItems("name");

The ItemsDbAdapter Class:

private static class DatabaseHelper extends SQLiteOpenHelper {
        private static final String FTS_TABLE_CREATE =
                "create table " + FTS_VIRTUAL_TABLE + "(" + KEY_ID + " integer primary key not null, " +
                KEY_NAME + " text not null);";


        DatabaseHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
        }

        @Override
        public void onCreate(SQLiteDatabase db) {

            db.execSQL(FTS_TABLE_CREATE);
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
                    + newVersion + ", which will destroy all old data");
            db.execSQL("DROP TABLE IF EXISTS FTStable1");
            onCreate(db);
        }
    }

public ItemsDbAdapter(Context context) {
            mDbHelper = new DatabaseHelper(context);
            this.mCtx = context;
        }

public ItemsDbAdapter open() throws SQLException {
        mDbHelper = new DatabaseHelper(mCtx);

        mDb = mDbHelper.getWritableDatabase();
        //mDbHelper.onUpgrade(mDb,1,2);  --> this is when i want to Upgrade version
        return this;
    }

    public void close() {
        mDbHelper.close();
    }