With jboss-4.0.3SP1 you have to load data in database manually due to a bug.
You could use JMX console and Hypersonic Service to load en execute import.sql
Hope this help.
It's a bug in the hibernate3.jar, just replace the jar in your DIR/SERVER with a new one form CVS or from the one in Seam CVS
I've tried looking but can't find them (probably not looking hard enough)
Can somebody tell me what the cvs settings are.
You can also download hibernate 3.1 from the hibernate website and use that jar, I've just did it myself and it works fine.