Resizing the Chat Box

I would like to resize the chatbox in my forum. I used the search button and all I found was that it was how to resize it to fit the right hand side of widgets. My chat is located at the top of the home page. The problem is it cuts off the log in im guessing? (im not sure as I cant see everything but once u click whats barely visible then u log in) and also cuts off at the bottom. Here is what it looks like:
Logged out:

Logged in:

Please how do make it fit to show everything?

I just went and took off the right side widgets and put them with the other left widgets. this fixed it as it made the middle section bigger. I am satisfied with this... so you can say fixed.