How to remove an error in sqlite that says sqlite returned: error code = 1, msg = no such table: DetailsCustomer

public class DBAdapter {
			
	public static final String COLUMN_ID = "ID";
	public static final String COLUMN_NAME = "NAME";
	public static final String COLUMN_SURNAME = "SURNAME";
	public static final String COLUMN_DATE_OF_BIRTH = "DateOfBirth";
	public static final String COLUMN_ADDRESS = "HomeAddress";
	public static final String COLUMN_EMAIL = "EmailNO";
	public static final String COLUMN_PHONE_NUMBER = "PhoneNumber";
	public static final String COLUMN_CITY = "City";
	public static final String COLUMN_PTYE_PAYMENT = "TypePayment";
	public static final String COLUMN_SHIPPING_TYPE = "ShippingType";
	public static final String COLUMN_CARD_NUMBER = "CardNumber";	
	public static final String COLUMN_username = "usernames";
	public static final String COLUMN_Password = "Passwords";	
	
	public static final String TAG = "DBAdapter";
		
    static final String DATABASE_NAME = "SuperComputers.db";
    static final String USERS_TABLE = "DetailsCustomer";
    static final int DATABASE_VERSION = 3;
	
private final Context context;

private DatabaseHelper DBHelper;
private SQLiteDatabase db;


public DBAdapter (Context ctx) 
{
	this.context=ctx;
	DBHelper = new DatabaseHelper(context);
}

private static class DatabaseHelper extends SQLiteOpenHelper

{
	DatabaseHelper(Context context) {
	
	super (context,DATABASE_NAME,null,DATABASE_VERSION);
			
	}
	
@Override
 public void onCreate(SQLiteDatabase db)
{
	try {
		  //db.execSQL(DATABASE_CREATE);		
		 db.execSQL("CREATE TABLE "+ USERS_TABLE + 
				    "("+ COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
				    COLUMN_NAME + " TEXT, " + COLUMN_SURNAME +" TEXT, " +COLUMN_DATE_OF_BIRTH+
				       " TEXT NOT NULL, " + COLUMN_ADDRESS + " TEXT, " + COLUMN_EMAIL +" TEXT, " + 
				       COLUMN_PHONE_NUMBER + " TEXT, "+ COLUMN_CITY + " TEXT, "+ COLUMN_PTYE_PAYMENT + " TEXT, " + COLUMN_CARD_NUMBER + " TEXT,"+ COLUMN_username + "TEXT ," + COLUMN_Password +" TEXT);");
		 
	} 
	   catch (SQLException e) {
		   e.printStackTrace();
		
	   }
	}
@Override
 public void onUpgrade(SQLiteDatabase db, int oldVersion , int newVesion) {

	Log.w(TAG, "Upgrading database from version " + oldVersion + "to"
			+ newVesion + ", which will destroy all old data");
	db.execSQL("DROP TABLE IF EXISTS " + USERS_TABLE);
	onCreate(db);

   } 
 }

//--open the database---

public DBAdapter open() throws SQLException
{
	db = DBHelper.getWritableDatabase();
	return this;
}

//--closes the database--
public void close()
{
	DBHelper.close();
}

public long insertRecord(String NAME, String SURNAME, String DateOfBirth,
         String HomeAddress,String EmailNO,  String PhoneNumber,  String City,
         long l, long m,String CardNumber,String usernames, String Passwords) {
    {
        ContentValues initialValues = new ContentValues();

        initialValues.put(COLUMN_NAME,NAME);
        initialValues.put(COLUMN_SURNAME,SURNAME);
        initialValues.put(COLUMN_DATE_OF_BIRTH,DateOfBirth);
        initialValues.put(COLUMN_ADDRESS,HomeAddress);
        initialValues.put(COLUMN_EMAIL,EmailNO);
        initialValues.put(COLUMN_PHONE_NUMBER,PhoneNumber);
        initialValues.put(COLUMN_CITY,City);
        initialValues.put(COLUMN_PTYE_PAYMENT,l);
        initialValues.put(COLUMN_SHIPPING_TYPE,m);
        initialValues.put(COLUMN_CARD_NUMBER,CardNumber);
        initialValues.put(COLUMN_username,usernames);
        initialValues.put(COLUMN_Password,Passwords);

        return db.insert(USERS_TABLE,null, initialValues);

       }

   }

public long insertRecord(String nAME, String sURNAME, String dateOfBirth,
        String homeAddress, String emailNO, String phoneNumber, String city,
        String string, String string2, String cardNumber, String usernames, String Passwords) {
    return 0;

    }

public void buttonRegister(View v)
  {
      Log.d("test", "adding");

      //get data from form
      EditText nametext = (EditText)findViewById(R.id.editTextName);
      EditText Surnametext = (EditText)findViewById(R.id.editTextSurname);
      EditText DOBtext = (EditText)findViewById(R.id.editTextDateBirth);
      EditText Adresstext = (EditText)findViewById(R.id.editTexAddress);
      EditText EmailNotext = (EditText)findViewById(R.id.editTeEmail);
      EditText Phonetext = (EditText)findViewById(R.id.editTexPhone);
      EditText Citytext = (EditText)findViewById(R.id.editTextCITY);
      Spinner PaymentSpinner = (Spinner)findViewById(R.id.spinnerPayment);
      Spinner ShippngMethod = (Spinner)findViewById(R.id.spinnerShipping);
      EditText CardNumbertext = (EditText)findViewById(R.id.editTextCARDNUMBER);
      EditText usernametext = (EditText)findViewById(R.id.txtusername);
      EditText pasword1 = (EditText)findViewById(R.id.editTexpassword);
    //  EditText repasword1 = (EditText)findViewById(R.id.editREPASSWORD);

      db.open();
      long id = db.insertRecord(nametext.getText().toString(), Surnametext.getText().toString(),
                                 DOBtext.getText().toString(),Adresstext.getText().toString(),EmailNotext.getText().toString(),
                                 Phonetext.getText().toString(), Citytext.getText().toString(),
                                 PaymentSpinner.getSelectedItemId(), ShippngMethod.getSelectedItemId(), CardNumbertext.getText().toString(),
                                 usernametext.getText().toString(), pasword1.getText().toString());

      db.close();

      nametext.setText("");
      Surnametext.setText("");
      DOBtext.setText("");
      Adresstext.setText("");
      EmailNotext.setText("");
      Phonetext.setText("");
      Citytext.setText("");
      PaymentSpinner.setId(0);
      ShippngMethod.setId(0);
      CardNumbertext.setText("");
      CardNumbertext.setText("");
      usernametext.setText("");
      pasword1.setText("");


      Toast.makeText(Regist.this,"Customer has been Registered",Toast.LENGTH_LONG).show();

     }