Given a certain type of document, I want to publish its children once it itself is published.  So I made class that inherits from ApplicationBase and wire up and event to Documet.AfterPublish from there I execute this code:

void Document_AfterPublish(Document sender, umbraco.cms.businesslogic.PublishEventArgs e)
        {
            if (sender.ParentId == templateStructuresNodeId) return;
            var templateNode = TemplateStructures.Children.SingleOrDefault(i => i.ContentType.Alias == sender.ContentType.Alias);
            if (templateNode != null)
            {
                foreach (var child in sender.Children)
                {
                    if (!child.Published)
                    {
                        child.Publish(User.GetCurrent());
                        umbraco.library.UpdateDocumentCache(child.Id);
                    }
                }
            }
        }

The problem is that once this code runs the children appear to be published, but if you examine them int he back office the Link to Document is listed as #  If I take the publishing code and just run it as a the result of a button click on a test page everything works fine.  The child items are published and their link url's are listed correctly.  What could be the problem?