You need a class for each table, with all the table properties/columns defined in it. Unless you haven't posted this code, I can't see it anywhere in what you've shown us. Start with that and let us know if it helps. ALso, you might want to try using more hardcoded paths instead of all that config file/OO overhead while you're still getting the hang of DBIC. That way, you can sort out your errors a little more efficiently.

Hope this helps!