A "Hidden track" on CD and audio in pauses

Then I am out of ideas, sorry.

Can you, if possible, post the steps you took to create the CD with a hidden first track? Thanks in advance.

This option must be checked:

Then here an image of a montage that contains audio before the 1st marker, aka in the pause area.
Nothing else is needed.

Thanks SO MUCH! I will try it again. These are the same settings I am currently using but I am going to try this with another montage. Thanks again!