forgot to check "Notify me". Please respond to this one.
Have you tried to drop the lib into /server/xxx/lib?
Do you have a line in your code anywhere to initialise the driver such as a Class.forName("driver class")?
Alternatively have you considered setting it up as a datasource and allowing JBoss to manage your connections?
BINGO! Your suggestion made me think I'd forgotten to do something prior to the connection attempt. Namely:
I did a copy/paste from another project without thinking it through. Thanks again!