How do I connect a already existing MySQL database to JBoss?

[timez]

I 've already created a database schema in MySQL and want a client application to write in the existing database. Unfortunately it always tries to create a new database and therefore I get following error message:

java.sql.SQLException: Duplicate key or integrity constraint violation message from server: "Cannot add or update a child row: a foreign key constraint fails"

My question now is how and where (ejb-jar.xml-file; JBoss Eclipse IDE etc.) can I specify that the existing database is used.
(<create table> tag is already set as "false" in standardjbosscmp-jdbc.xml)

Thanks for helping!

[adrian.brock]

Moderated: This question is for the persistence forums.