Are you using a mono or stereo jack?
Book calls for mono, but then explains it in stereo.
If you try using a stereo jack, you don't use the normal tip & ring ends. Use the tip and the farthest away from the tip (sleeve or ground).
You can also punch down the wire to the 66-block on pair 13.
Tip-Black/Green
Ring-Green/Black

Also - if you are using a Stereo SOURCE. Then tie the left & right together for the sound(Ring) and then the Ground(Tip) will be your other connection.

If still no sound try flipping Tip & Ring
If still no sound, then someone blew up the MOH circuit


If CON is the opposite of PRO
Then what is the opposite of Progress?