Screen Capture Landscape

I am trying to take a screen capture in Landscape mode.

Using this method:

UIScreen.MainScreen.SnapshotView(true).Snapshot();

Snapshot is from this post: http://blog.xamarin.com/snapshotting-views-in-ios-7/

Anyways, This works correctly in the simulator but not on the device. I get a black screen.

UIScreen.MainScreen.Capture(); works fine in Portrait mode.

Any thoughts?

Thanks, John