The chat tool feature on Bb needs a Java Plug-in to run. The first time you try to join a chat a window will pop up and tell them they need the plug-in if they don’t have it. The pop-up will provide a link to the plug-in.
Click the link and you will get to the page that has the plug in, and you will be prompted to save or open. Click open and the plug-in will install for you. The Chat feature is found under Collaboration in your control panel.