Beginner Problem

This is a total beginner question but I cant seem to find the answer.

When creating a button…

If the button is text based, you can type text into the button frame and then create a new keyframe for each subsequent event (over, hit, down).

My question is… sometimes when I create a button the surrounding text area acts as a button and othertimes it does not. What would cause this?

Sometimes I can only click on the actual color of the text.

Does that make sense?

Thanks