Android Sqlite Update the column password? Its not updating my database

How can I update my sqlite db column "password" by using my sqlite db column "name"??

My sqlite Table:

// Login Table Columns names
private static final String KEY_ID = "id";
public static final String KEY_NAME = "name";
protected static final String KEY_EMAIL = "email";
protected static final String KEY_PASSWORD = "password";

   private static final String CREATE_LOGIN_TABLE = "CREATE TABLE " + TABLE_LOGIN + "("
        + KEY_ID + " INTEGER PRIMARY KEY, " + KEY_NAME + " TEXT, "
        + KEY_EMAIL + " TEXT, " + KEY_PASSWORD + " TEXT "
        + ");";

My dbhelper:

// Updating the password database

public int updatePassword(String name,String newpassword)  {
    db = mSQLiteHandler.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(SQLiteHandler.KEY_PASSWORD, newpassword);
    String selection = SQLiteHandler.KEY_NAME+" =? ";
    String args[] = {name};
    int count = db.update(SQLiteHandler.TABLE_LOGIN ,values, selection, args);
    return count;

}

My activity: I want to take my Name from db and select particular row of my password and update that password with Newpassword. "Several times"

    btSubmit = (Button) findViewById(R.id.submitButton);
    inputUserName = (EditText) findViewById(R.id.etUserName);
    inputNewPassword = (EditText) findViewById(R.id.etNewPassword);
    inputConfirmPassword = (EditText) findViewById(R.id.etConfirmPassword);

    //Database
    db = new UserData(getApplicationContext());


    // Progress dialog
    pDialog = new ProgressDialog(this);
    pDialog.setCancelable(false);

    btSubmit.setOnClickListener(new View.OnClickListener() {

        public void onClick(View view) {
            String username = inputUserName.getText().toString();
            String newpassword = inputNewPassword.getText().toString();
            String confirmpassword = inputConfirmPassword.getText().toString();

            if(newpassword.equals("")&& confirmpassword.equals("")) {
                Toast.makeText(getApplicationContext(), "New password or Confirmpassword is empty",
                        Toast.LENGTH_LONG).show();
                return;
            }
            try {


                if (newpassword.length() > 0 == confirmpassword.length()>0){
                    db = new UserData(ResetActivity.this); //create again database to retrive
                    db.updatePassword(name,newpassword);
                    Toast.makeText(getApplicationContext(), "Matched! And Updated", Toast.LENGTH_LONG).show();

                    Intent i1 = new Intent(ResetActivity.this,
                            LoginActivity.class);
                    startActivity(i1);
                    finish();
                }
                else {
                    Toast.makeText(getApplicationContext(), "Invalid ", Toast.LENGTH_LONG).show();
                }

            } catch (Exception e) {
                Toast.makeText(ResetActivity.this, "Problem occurred",
                        Toast.LENGTH_LONG).show();
            }

        }
    });

}