When MyView gets pushed on to the NavigationController, I have the following code

public override void ViewDidLoad ()
{
    this.NavigationController.Toolbar.SetItems(new UIBarButtonItem[] {
        new UIBarButtonItem("Next",UIBarButtonItemStyle.Plain,  ClickNext) 
    }, true);
            this.NavigationItem.Title = "Proposal Plan - Step 1";
}

The Title gets set properly, and the code runs but in my Toolbar at the bottom of the view I don't have the "Next" button I am expecting. I put a breakpoint and verified that the Toolbar after running that line does have my button, but still nothing.

What am I mising?