SQLite database handling with android application

Hi i am going to create a SQLite database and insert records. but my database does not create. following is the code. Cant understand why. trying this for a long time

If someone can help its a great help

public class DatabaseHelper extends SQLiteOpenHelper{


static final String dbName="MyDatabase";

public DatabaseHelper(Context context) {
      super(context, dbName, null,33);    
}

@Override
public void onCreate(SQLiteDatabase db) {
    String qry = "CREATE TABLE DEPT(dept开发者_高级运维_id INTEGER PRIMARY KEY, deptName TEXT)";
    db.execSQL(qry);
}
}

I am calling the constructor like this

public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    DatabaseHelper dp = new DatabaseHelper(this);



    Toast.makeText(this, "Finish Execution", Toast.LENGTH_LONG).show(); 

}
}

create your database by using this sample http://marakana.com/forums/android/examples/55.html