I'm trying to port my applications from JServ to Tomcat. The servlets making API calls to JDOM in Jserv work fine. But in Tomcat, the JDOM calls generate a NoSuchMethod error. How can I get Tomcat to recognize the JDOM API? I've tried copying the .jar file to /common/lib, /common/endorsed, /shared/lib and /myWebApp/WEB-INF/lib and no luck. I put in some debug code to print the System.getProperty("javax.xml.parsers.SAXParserFactory") and it is null. Works fine in Jserv. Any ideas?