User development, A new message was posted in the thread "Can't deploy EJB (Eclipse)": http://community.jboss.org/message/524008#524008 Author : Xavi P Profile : http://community.jboss.org/people/xafft Message: -------------------------------------------------------------- Hi Wolfgang, I already had visited the first link and tried every one of the posts there with no luck, I think they fix it if you have JBoss 4 version. Never mind, I've finally been able to find a solution : ) It was the jre stuff, let me explain in case someone else got the same issue with Eclipse Galileo and JBoss 5.1.0: I desinstaled jdk 6 and installed jdk 5.0, downloaded again Eclipse and JBoss to start with clean installations and upgraded Eclipse with the following plug-ins of JBoss Tools (this maybe isn't necessary):     Hibernate Tools     JBoss WebServices Tools     JBossAS Tools And that's all, I didn't have to do anything with the infamous endorsed folder! Nevertheless, I'll try your JBoss plugin and test it with jdk 6. Thanks so much for your time Wolfgang, I appreciate it -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/524008#524008