Getting a listing of resources from a path

[Laura McCord]

I tried the example, "Getting a list of subresources of a resource", 
that is located in the jackrabbit Webdav wiki 
(http://wiki.apache.org/jackrabbit/WebDAV) documentation. I'm getting an 
error associated with

DavMethod pFind = new PropFindMethod....
Caused by: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
       at 
org.apache.jackrabbit.webdav.client.methods.DavMethodBase.<clinit>(DavMethodBase.java:50)


I don't understand what this is telling me. Can someone help?

Thanks,
Laura