I cannot change the dimensions of the chat box. I have changed them in the settings and also in the part where you insert it within a page.
I have tried on Chrome, Firefox & IE. All cookies were cleared etc.
@aecnu asked me to log a ticket so that you can check out the errors CTRL + SHIFT + J
The chat is on this page http://www.goalprofits.co.uk/chat/
If you need a login, please let me know