Thanks for your answer ! I did a test using the 2.4.0.RC2... Connection was OK, but the client could not receive messages. Instead, I had, for each message (that was quite a lot...) Is there any way to work around this problem? (I really would like to use JBoss Messaging for our applets :-)) Laurent | Exception in thread "Thread-13" java.security.AccessControlException: access denied (java.lang.RuntimePermission setContextClassLoader) | at java.security.AccessControlContext.checkPermission(Unknown Source) | at java.security.AccessController.checkPermission(Unknown Source) | at java.lang.SecurityManager.checkPermission(Unknown Source) | at java.lang.Thread.setContextClassLoader(Unknown Source) | at org.jboss.messaging.util.JBMExecutor$TCLExecutor.run(JBMExecutor.java:75) | at EDU.oswego.cs.dl.util.concurrent.QueuedExecutor$RunLoop.run(Unknown Source) | at java.lang.Thread.run(Unknown Source) | | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4149673#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...