Hi, When i have readed the documentation obout JBoss AS 4.0.5 GA, the requirements say: 1. JDK 5 (v1.5.0_06 recommended) 2. Ant (v1.6.5 recommended) 3. JBoss Application Server v4.0.5GA [with ejb3] I must run the application server under JDK 5 v1.5.0_06, but can i develop my proyects in other version?, for example if my AS use JDK 5_06, can i develop my application under JDK 5_11 or JDK 6??? Must i develop my application with the same version that my application server is running? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4046042#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...