Problems with importing java class

Ruby JRuby
#1

I’m trying this code:

include Java
load ‘marge-core-0.5.jar’
import ‘net.java.dev.marge.inquiry.DeviceDiscoverer’

That generates this error:
NameError: cannot link Java class
net.java.dev.marge.inquiry.DeviceDiscoverer

Some more documentation about marge can be found here:
http://wiki.java.net/bin/view/Mobileandembedded/HowTo05

Does anyone know how I can debug this problem? Or am I just doing
something wrong?

Thanks in advance!