Yesterday I installed the wp-cumulus plugin to show my tags in a nice way within the sidebar. The install goes fine and the plugin is shown in the widget list. But I can't add the widget to the sidebar, there is no button behind wp-cumulus. Like it is already added to the sidebar. There are no other sidebars with this plugin and I only installed a single theme on my wordpress backend. Can anybody help me with this issue. Thanks
gr Arno