How to make Enter on a CheckBox and MVPDatePicker act as TAB button

I want the Enter Key to behave as the TAB key. Therefore I've been using the keyDown event with the following code:

    if (e.KeyCode == Keys.Enter)
        {
            e.SuppressKeyPress = true;
            SelectNextControl(ActiveControl, true, true, true, true);
        }

or

     if (e.KeyCode == Keys.Enter)
        {
            SendKeys.Send("{TAB}");
        }

However, whenever I encounter a CheckBox or a MVPDatePicker control, the focus got lost and pressing enter doesn't do anything anymore. I had to press TAB to unlock the situation.

Does anyone have an idea on how to solve this problem?