Embedding font doesn't work

I’m trying to embed a font for two buttons (next and back) and it just won’t work.
Used the same code before when playing around with another “project” and then it worked great, so I just don’t get it.

next_btn.next_txt.embedFonts = true;

I’ve tried putting the code in the next_btn movieclip (and of course removing that line in the code) and that didn’t work either.
Also tried adding “_root” infront of the code, again to no avail.
I have the font in the library and I have chosen linkage, export to actionscript.

I can’t supply a fla file I’m afraid, but there aren’t any advanced coding (in fact in these files this, except for stop commands, is the only code) so there’s really nothing more to it.