Hi all ,
I have the same problem.
I have tried with Oracle 10g and MySQL 5 with the both lastest drivers.
And I have change my jdk 1.6 to jdk 1.5.0.6.
But it still not working.
If I click in the test button in "Edit JNDI Connection" apears the following error:

--> The message returned was Unknown database 'steelwheels'.

I have done exactly what the Pentaho Cube Designer User Guide sais.

Whats now ??? Are the steelwheels database wrong??? What I have done wrong?

Can be the answer inthe mondrian installation?

Help NEEDED!!!