Thank you everyone by attention. I`m trying to migrate from Jboss 3.2.3 the BIE software, an open source process manager, to Jboss 4.1 I`m having trouble. When the Jboss starts , for some classes that exists and are valid, the server issues an error, saying that it couldn`t find ou read the file. However it was there. First I tried to deploy from the original directory, later I copy the directory structure from the application to the deploy. Could someone help me or indicate where I can found more information on that? thank you one more time.