What exactly didn’t work? I’m still running it on my blog, which is on WordPress 2.7 and it works fine. I also just tried it on another blog (again, running 2.7) and it works fine on there also. All I can say without knowing further details is to make sure you have the appropriate checkbox checked if you want it to randomize everywhere your theme has a bloginfo(‘description’) tag. Otherwise you have to modify your theme and add get_random_tagline() wherever you want a random line to show up.
Also, please do not give your fellow users’ plugins bad ratings just because you don’t know how to use them properly, or at least without giving a better description other than “it doesn’t work”.