Adding a chatbox

I can't believe how difficult it is to add a chat box to my blog. The instructions are very straightforward and easy to comprehend. The steps are easy to execute too. But why is it not working for me?!?!

According to http://chatter.flooble.com/, "Flooble chatterbox works as a javascript include, which means that there is no additional strain on your server, and that it can be added to a page by simply inserting one block of HTML where you want the chatterbox to appear. We give you the code, you just paste it in. Nothing could be simpler."

Nothing could be simpler indeed... It's mocking me!!

Arghh!!!

HELP!!