There is something very wrong with your installation, because 3.0.0.CR1 no longer has the class org.jboss.ide.eclipse.as.ui.views.server.JBossServer, or the class org.jboss.ide.eclipse.as.ui.views.server.ServerFrame, or the class org.jboss.ide.eclipse.as.ui.views.server.ServerTableViewer. All of these classes are in your stack trace, which means they exist in your installation. They are not in CR1. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4202721#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...