Most of the time when my Menu does not show up it's because I've forgotten to add a "Shell Module" (http://world.episerver.com/Documentation/Items/Developers-Guide/EPiServer-Framework/7/OnlineCenter/OnlineCenter/#ModuleConfiguration)
But I guess you've already checked that part?
I am having trouble using MenuItem attriubute for creating global menuitems in topnavigation inside episerver. Decorating my class with this does not work, or they do not show at all:
But if I use the interface IMenuProvider at get the menu item to show. What am i Missing?
I have tried with the documentaiont about the subject: http://world.episerver.com/Documentation/Items/Developers-Guide/EPiServer-Framework/7/OnlineCenter/OnlineCenter/#Navigation