how can i attach an mp3 in pages and convert it to a PDF

I attach an MP3 to my pages document it it works fine. But when I convert the file to a PDF it doesn't transfer to a that format.

The Pages Help told me -

"When saving your document, make sure you select "Copy audio and movies into document" in the Save window after you choose Save or Save As. (if you don't see the option, click the disclosure triangle next to the field, and then click Advanced Options)

Here is my problem, my Pages just says has a "save a version" option and no disclosure triangle that will lead me to Advanced Options.

Thanks