If it stays on Maintenance mode, you can fix it by running yum update interworx.
If that doesn't fix it try running service iworx restart if that gives you an error follow: https://licensecart.com/plugin/support_manager/knowledgebase/view/412/bug-failed-to-restart-iworx-service/13/
If that still doesn't fix your error and you have a bind IP issue please see this post: http://forums.interworx.com/threads/8397-Interworx-stuck-in-maintenance-mode?p=28229#post28229
