When I go into the chat function all I get is username and password in invalid. Is there someone who can tell how to solve this issue?

Please update/load Java client at www.java.com.

I went into www.java.com (http://www.java.com) and updated, but I am still getting an error message when I click on the chat function.

Try clearing your Internet cookies.

Also, what operating system are you using?

I am using windows xp.