CarrierWave

when i use the foaf example,there are some problems
occured,one as follows:

Exception in thread "main"
com.vinculumtech.platform.system.PlatformException: c
ould not find class
com.vinculumtech.foaf.image.AssociationImage

I download the example package(cw-foaf-ex-0.1.tgz)
from here and do not find the class.What is the problem?

My email is winzhen@sina.com.

Thanks a lot.