Sorry for the cross post (http://jasperforge.org/plugins/espforum/view.php?group_id=102&forumid=103&topicid=45718&res=41), but both are relevant: How do I set JTDS on the classpath when I use it as a NetBeans [6.5] plugin? I tried in C:Program FilesNetBeans 6.5ireportlibs and C:Program FilesNetBeans 6.5ireportmodulesext. I noticed both JARs' manifests contain specific JAR locations in them. Should alter alter the manifest in the JAR?