Intro text not showing on post

Hi there,

I have added a read more section to a blog post but the intro text (text before the read more ) is no longer showing when I view the post. I have set the show intotext to yes in Settings>Views> Show Introtext but still don't see it.
you can see the article here:
http://www.manycaps.com/blog/accidents-incidents.html
I am linking to the article from this area
http://www.manycaps.com/mango/modules/article-mango-test.html