Hi carmine-
I'm the content manager at GT. I logged in as a regular user but I don't see a problem. There are several Ron Sayer tutorials in using rock effects in chapter 7, followed by a couple of tutorials by Andy Gurley. They all show up and work fine.
Please send me a forum PM so we can get to the heart of this matter:) If you can describe the problem in very specific detail, step-by-step, that will help a lot.
Thanks much!