Confirmation on preference change

Hi,

hello, I want my subscribers to get a confirmation email when their preferences are changed. And I would want a small text to appear when the subscriber’s preferences are saved. How can I achieve this?

I navigated to List Building > Subscription > Profile. And I put a message to Other Messages > confirmation after profile save. However, it does not show up, when a subscriber saves his preferences.

Thanks in advance,
Jamal