Regarding switching to MySQL on JBoss5. Yes, old instructions will not work. The file you are looking for is for the old JBossMQ messaging service - that has been replaced in the JBoss5 with the new JBoss Messgaing. Your best bet is to read the documentation that comes with JBoss Messaging to get if set up. Other than that, supplying a *-ds.xml file in place of hsqldb-ds.xml should be all there is to it. I have some resources that explain this in some detail, and I know it works with beta3 and beta4, but it is not free. I can supply the url if you like. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4138082#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...