Box2D example not building

Hi, I’m trying the basic examples for Android. On Processing for Android, when I run the example from just below “A more complex example using Box2D”, it complains:

No library found for shiffman.box2d
No library found for org.jbox2d.collision.shapes
No library found for org.jbox2d.common
No library found for org.jbox2d.dynamics

I couldn’t find the library in “Manage Libraries” so followed the link trail and downloaded from Box2D for Processing. Then copied box2d_processing to ‘sketchdir’\libraries.

That cleared those errors, but now I have these two:

The class Box does not exist.
The class Wall does not exist.

What have I missed?