Quote Originally Posted by DivaVocals View Post
It's possible another add-on you've installed is causing the issue.. suggest using the developer tools in Zen Cart to find out where else that class is being declared..
Thanks again DivaVocals.

I have just used the Developers Toolkit and the only files it came back as having the text: function zen_db_insert_id() in them are testimonals.php and admin/includes/functions/database.php (my admin file is renamed but have put it in this post as the default).

Could it be this file therefore that is causing the problem?

Thanks