As in my previous post in thread http://www.jboss.com/index.html?module=bb&op=viewtopic&t=34392 the problem with jboss 4.0.5 [java] Root exception is java.io.InvalidClassException: [java] org.jboss.proxy.ejb.GenericEJBInterceptor; local class incompatible: [java] stream classdesc [java] serialVersionUID = 3844706474734439975, local class serialVersionUID = 4582256576523491346 still remains, also working and re-building with jdk 1.5.0 as suggested. Can be windows vista the issue? now I will try to run jboss 4.0.5 and sdk 1.5/1.6 under XP and test if everything works... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4054326#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...