Placing the JDBC driver JAR files in server/default/lib is acceptable. Wait a minute, I re-read the error mesage. Looks like you are not use a type-4 JDBC driver (pure Java), that instead you are using a type-2 (requires native C library). In that case you must either change your PATH (Windows) or LD_LIBRARY_PATH (Linux) env var to include the directory containing the C library required by the driver. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4243304#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...