Html Helper Not Working On Nested Site Master Page

I'm sure I'm doing something really stupid, but I've created a Nested Site master for one section of my app. I got the extra text to show up, like it should on the new Site Master

Solution 1:

In your nested master page code behind, do you inherit from System.Web.Mvc.ViewMasterPage ?

Reference: Code rant: Nested Master Pages with the MVC Framework