Well it's a common problem and usually there are a few things to try. Make sure you have the latest java and such. Also something I have found that works is clear out your cookies etc. These are the 2 ways I know to fix the chat...other then just keep trying...but believe me your not the only one who has these issues.
Hope it helps
Blake A. Worthington
At what time(s) do you try to access chat? Depending on your timezone, at the time you're trying to enter chat, you may be hitting the timeframe where current time & chat time do not match up.



