Migrating from JServ to OC4J: problems with XSQLServlet configuration

I'm trying to move an application using xsql pages from 9iAS to 10g (9.04). Development is currently done under JDev9 (9.02) an its OC4J standalone server.
I guess I've done most of the configurations, since the application is working correctly now, BUT only with the connections defined statically in the XSQLConfig.xml of the XSQLServlet. On JServ, we implemented our own connection manager to pass our connections to the XSQLServlet as defined by the <connection-manager><factory> tag. Now, under OC4J, this no longer works:
The log files tells:
Failed to create custom connection manager factory: "our.connection.manager.factory": Using default.
And with the default one, we get of course the 'cannot acquire database connection' error message which is ok, since we're not using one of those defined under XSQLConfig.xml...
Background: Our connection manager is contained in a jar file with many other classes. These are visible to the 2 applications ("P" and "T") we're running successfully under OC4J Standalone. As I interprete the message as the XSQLServlet not being able to create an instance of our ConnectionManager, I guess I missed somewhere an library or classpath entry??
Many thanx for any hints!

There was a generic Migration guide produced for the earlier 9.0.2 release with some content on migrating from JServ to OC4J.
http://download-west.oracle.com/docs/cd/A97331_08/migrate.902/migrate/intapps.htm#1006415
It's hard to provide much help without more details.
cheers
-steve-

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Migrating from JServ to OC4J: problems with XSQLServlet configuration

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