formatting chat box not possible

I have purchased the chat plugin but cannot get it to format properly – it asks me the size and height and when I set that it is on a page that is over 950px high and I am setting it as 350px and it is setting the actual message area as 350 (I think) but the complete chat widget area is much bigger and it keeps dropping too far down the screen and I want it to be the message area then straight under that the place people type their message and under that the facebook/twitter login buttons without all the space inbetween the message display area and the message type area….

Please help