I inserted this Google analytics code into my family tree web page and after a few days i still get that no activity has been reported
Doesn't look like there's any analytics code on there, so that's most likely the problem. :-)
Copy and paste your code from the analytics site to your website and paste it down near the BOTTOM of the page before the ending
Also, I don't think you're going to see any reporting right away. I think it takes 12-24 hours before you start seeing stuff.
Hope this helps.
I don't see any GA code on that site. You're going to want to place it right before the closing body tag on every single page you want to track. In your case, every page that loads in those frames will need the GA code.