[Plugin: CubePoints] Donate Points

I use buddypress integration and so far so good but when I click on the “donate points” tab a text box pops up the entire width of the page. It looks pretty awkward. I have unsuccessfully tried to shorten the width. Can anyone tell me how? It needs to be the width of this comment box or something smaller than 1500.

http://ww.wp.xz.cn/extend/plugins/cubepoints/