Pay Per View Selection Tool Not Working

Can't get it to work. Want to protect content on PAGES. I am testing.

I want to use Selection Tool

This is what I've done on Settings:

1) I set up PayPal API stuff on Settings
2) I enabled Protection for Pages on Settings
3) I selected Selection Tool on Settings
4) My ONLY payment option selected is ONE TIME VIEW

This is what I've done on the Protected Page itself:

1) Enabled -- have tried both Follow Global and Always Enabled
2) Method - Selection Tool
3) I highlight the area I want protected and click the Green Icon and fill in description and price and update

The button doesn't show

here's link to the test page -- it's the latin I'm trying to protect

What am I doing wrong?

thank you!