the firebug error console shows that the file:
cannot be found
this is because you have installed to the admin older instead of admin_cms which is the standard location
the WA_CMS/WA_CMS.js file calls that file in the following line:
xmlHttp.open("POST", cms_root + "/admin_cms/inline_edit.php" ,true);
you will need to edit that to:
xmlHttp.open("POST", cms_root + "/admin/inline_edit.php" ,true);
so it is looking in the correct place.