The "Enabled" property of a button doesn"t seem like inherited from

I have a child form that inherits a parent form. There are buttons on
the parent form:

protected Button continueButton;
protected Button pauseButton;
protected Button retryButton;

Since the child form should inherit the buttons from the parent form,
there is no need to redefine them in the child form.

In the debugger (in parent form),

this.retryButton.Enabled = false;
this.continueButton.Enabled = false;
this.pauseButton.Enabled = false;

The "Enabled" property for each of them is false in the parent form.
Therefore, I expect to see them greyed out on the child form. However,
they're all enabled on the child form. Anyone can tell me what's
wrong?