OK, as we all know, sometimes the chat doesn't work that well.
So, TRY THIS!!!
When you click start on your in-game window click the tabs of the chat repeatedly. So when you get on, look to the bottom left. and where it says 'company chat' and 'global chat' click them both in repeating manners.
This will make the server send the information to your computer and you'll have the chat working.