Newsletter subscribe shortcode doesn't seem to work

In General Settings> Subscribe ID Page, it asks for the page number where the Subscribe form will appear.

So I created a page, put my curse under edit to see the URL which says post=890 for the page at http://greenactionnews.net/newsletter_signup/

And I added the shortcode [enewsletter_subscribe_message] to this page. However the subscribe form is not appearing. Neither is there an Unsubscribe area showing up even though I have the unsubscribe shortcode on the page as well. What am I doing wrong, I'm trying to make the newsletter subscribe and subscribe forms to show up.