I am new to JBOSS. Can you throw some more light on what is snow drop. It seems we need to use these libraries to integrate with JBOSS. But will it work in tomcat as well. We need to use the app on both tomcat and JBOSS as well. Apart from this, is there any other solution? Just want to understand why this problem is occuring only in JBOSS 5.1? I could able to deploy it in 4.2.3 version.