looks like plugin org.mozilla.xulrunner.win32.win32.x86 hasn't been download into your system. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4214927#4214927 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4214927