Cannot find Region in RegionManager (using PRISM)

Question

I\'m writing an application in Prism. I have a user control and contains two controls. These both have Regions assigned to them. The user

Answer 1

Sorted now. I needed to register the region manager in the constructor of my presenter class.
That way the regions in my new window could find my global region manager.

RegionManager.SetRegionManager(view as DependencyObject, regionManager);