jabref plugin does not load

Reported by gaguirre: I just installed latest jabref plugin on Jabref 2.6 under Windows XP. When I restart jabref, the plugin does not show up under plugins menu, and get the following error in the console:

Apr 11, 2011 3:20:02 PM org.bibsonomy.rest.RestProperties getInstance WARNING: unable to initialize jndi context Apr 11, 2011 3:20:02 PM org.bibsonomy.rest.RestProperties getInstance INFO: reading config file 'RestConfig.cfg' from classloader -> nowhere (not found)