I had the same problem. I had originally installed JBoss 4.0.4GA using the "Run Installer" option, and chose to secure the admin console. I removed JBoss, downloaded the zip and did a simple unzip to reinstall. (Did not set up any security) I was able to start the server and deploy EAR files by right-clicking the EAR file and choosing RunAs->Run On Server. Although I have been able to start the server in debug mode, I have not been able to deploy using DebugAs->Debug On Server View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3978539#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...