simple Venkman issue - breakpoint not accepted

I've used debuggers for multiple languages for over 20 years.

When I try Venkman 0.9.88.2 in Firefox 5.0 it does not act as
expected. When I try the suggestions here:
http://www.webmonkey.com/2010/02/debug_javascript_with_venkman/
nothing happens.  (They are using a different version 0.9.87.  The
"disclosure triangle" is missing on the new version.)  You do not see
the script.  When I actually execute the script by clicking the HTML
form button on the webpage, the script shows up in the  Loaded Scripts
window but you can only set a Future break point in the code loop.
Also, here https://developer.mozilla.org/en/Venkman_Introduction it
says about the same thing - you just browse the site that contains a
javascript and it should appear in the Loaded Scripts window, but it
does not.

What is happening?

- joe