JBoss development, A new message was posted in the thread "How to use Java to connect to JBossMQ server by JNP Protocal?": http://community.jboss.org/message/520215#520215 Author : Adrian Brock Profile : http://community.jboss.org/people/adrian@jboss.org Message: -------------------------------------------------------------- I don't think its a network problem since you've managed to do a lookup in jndi for the ConnectionFactory on port 1099 It is the creation of the jms connection via jboss-remoting that is failing.   But, where are you getting your jboss-remoting.jar from on the client?   According to this, jboss-remoting is 2.5.1 in JBoss 5.1.0.GA http://viewvc.jboss.org/cgi-bin/viewvc.cgi/jbossas/tags/JBoss_5_1_0_GA/co...   In 2.5.1, the error is thrown on line 276 NOT 273 as in your stacktrace. http://viewvc.jboss.org/cgi-bin/viewvc.cgi/jbossremoting/remoting2/tags/2...   So you're picking it up from the wrong place somehow. You'll probably get a better response if you post in the jboss-remoting forum (after you've searched to see if it is already answered :-). Configuring log4j properly on your client, probably wouldn't hurt either. -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/520215#520215