Framerate with physics demo

I built the physics demo from here:

When I try to run it on my Samsung Galaxy S II, the framerate is less than 1. I had previously downloaded and tested the JMonkeyEngine Demo from the Marketplace, and all the demos worked fine, with no obvious slowness. Has anyone else built & run applications like the physics demo that run smoothly on their Android device? The SGS2 is fairly new and powerful, so it should handle this application better.

from this thread:

sounds like i need to swap out the jbullet library with this one: