CMS Made Simple Forums

I had had much success using cms made simple for the first time. But unfortunately just as I was adding the last modules (JM_Forum, Listit2item and creating the logout page for frontendusers), I noticed that none of the modules made any output on the site. For example though I had inserted {cms_module module=FrontEndUsers form=logout returnto="Home"} into http://acomin.org/index.php?page=logout the logout template isn't displayed. How do I find out what made these module stop functioning