Multisite doesn't work

Today I tried your plugin because I was looking for a very flexible Maintenance mode-plugin that works with WP Multisite.
In the plugin description it says “Multisite Support” but if I “Network Activate” the plugin it’s not possible to use, because no menu-item appears …
Hope you can fix this with the next update 🙂

http://wordpress.org/extend/plugins/coming-soon-maintenance-mode-ready/