Hai Guys, Those are really good pieces of advice for a beginner like me. anonymous wrote : | For just "looking at it", you can use the hypersonic database. | it is provided with jboss portal, and is the default database. | Well, Antonie talked about a hypersonic DB built into JBoss, Where is that located and how should i delete the files. There is a portal-hsqldb-ds.xml and how should i configure it. Once again thank you very much for the help. For PeterJ: well first i was trying to figure out where i had to put the preferences,looking at the DTDs for 2.6 i tried putting them in -instances.xml but did not work out and then i put the preferences in portlet.xml, then the preferences were picked up. Then later i figured out that the problem might be related to the error being thrown. So i started the post this way. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4064562#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...