Use of the "sorted()" built-in function makes the current build of this plugin incompatible with python 2.3 (minimum of 2.4 is now required). Also, there is another dependency (XmlRpcPlugin) that is required for this plugin that isn't mentioned in the plugin wiki.
The only reason I bring this up is that I've spent several hours trying to track these problems down, so hopefully this might save someone else the time.
As always, make sure to enable DEBUG logging when you run into problems!
Suggestion for resolution: Update the wiki page for this plugin specifying Python 2.4 as a minimum requirement, and the additional requirement for XmlRpcPlugin.