Changing Box Size for Chat

Hello,

I'm having a problem with the settings in chat, where the size of the Chat Box is too small to notice. I have changed the settings to make it bigger, but it's not taking affect. My site is a multisite installation for several internet radio stations. The site that has been getting activity is http://www.urbanballroomradio.com. Chat is accepting log-ins, but is not showing the chosen name of the person making the comments either. I'm not sure if that's because of the size of the box, but I really need it to be larger for all of my sites.

I have given you support access.

Are there any tutorials for the Chat plugin?

Thanks,
Dave