[Plugin: SP Client Document & Project Manager] something wrong with my theme

Hi, when i active this plugin, my home page only show slide area and footer,but all Front tabs that show at the middle area are all dispear, i used a free theme name “Nova”, here is online demo, so could you help to see it, thank you so much about it;

http://ww.wp.xz.cn/extend/plugins/sp-client-document-manager/