mysql datasource not bound question

[smeagel]

I am unable to get any datasource to work (except Hypersonic).
i copy the -service.xml into the
server/default/conf/
dir and edit it.

do i have to do something else.
I am referencing it
DataSource ds = (DataSource) new InitialContext().lookup("java:/comp/env/MySqlDS");

and like
DataSource ds = (DataSource) new InitialContext().lookup("java:/MySqlDS");

and it does not lookup.

I can not find it in my JNDI tree (in jmx-console)
http://localhost:8080/jmx-console/HtmlAdaptor?action=inspectMBean&name=jboss%3Aservice%3DJNDIView

what do i have to do to register it as a datasource?
i thought the standardjaws.xml was obsolete?
and it doesn't like 2 datasources in it either.?

please help!!!!