Rigid Body file example doesn't work

Hey Everybody,

I'm new to Kangaroo2 and want to see how the rigidbody.gh file in the Example folder from Kangaroo2 works. But after opening the file there is nothing I can klick on in the Rhino workspace to move the cubes. I dont know if I am doing something wrong or if there is some problem with something else. And in the Grasshopper workspace the Grab command has some orange lines. After klicking on the Grab command it turns red and says: Error: 1. Solution exception:The module wasnt found.

It would be nice if someone could tell me what I need to do in order to get the rigidbody script running or what I'm doing wrong.

Tobi