WPF animation problem when using Storyboard from code

Question

I'm working on a 3D carousel of flat, square tiles that will contain information. I'm working on animating this carousel to rotate when a person presses Next and Previous buttons.

I've gotten it to work by using BeginAnimation on the Rotation property of the RotateTransform3D I applied to the carousel, but I can't seem to make a Storyboard version of the same animation work. The reason I need the Storyboard version is for the HandOffBehavior.Compose parameter because without it, multiple clicks of my next and previous buttons results in a misaligned carousel.

Here is the code for the Storyboard:

RotateTransform3D tempTransform = (RotateTransform3D)wheel.Transform;
AxisAngleRotation3D rotation = (AxisAngleRotation3D)tempTransform.Rotation;

Storyboard storyboard = new Storyboard();            
DoubleAnimation animation = new DoubleAnimation();
animation.By = defaultAngle;
animation.Duration = TimeSpan.FromSeconds(.5);

Storyboard.SetTarget(animation, rotation);
Storyboard.SetTargetProperty(animation, new PropertyPath("Angle"));
storyboard.Children.Add(animation);

storyboard.Duration = animation.Duration;            
storyboard.Begin(new FrameworkContentElement(), HandoffBehavior.Compose);

For some reason, this code results in absolutely nothing. I followed the examples I had to the letter, so I am quite frustrated. Any help is greatly appreciated. I am also completely open to using BeginAnimation if I can replicate HandOffBehavior.Compose.