ClassNotFoundException if CMP2 entity-command is used

If a EJB2 - CMP2 EntityBean uses an entity-command 'mysql-get-generated-keys' to generate the primary key, the server deploy with an error message:
Caused by: java.lang.RuntimeException: JBAS018572: Could not load driver class: com.mysql.jdbc.PreparedStatement

This may happen for different entity-commands if other databases are used!

If the datasource module is added to the org/jboss/as/cmp modules dependencies, the startup shows:

MSC000001: Failed to start service ... : JBAS010785: Failed start store manager
Caused by: java.lang.RuntimeException: JBAS010732: Couldn't create entity command
Caused by: java.lang.RuntimeException: JBAS018574: Could not load org.jboss.resource.adapter.jdbc.StatementAccess