Thank you Andrea,

I tried what you said but I still get 404.

Route in Global.asax:

routes.Add(new DynamicDataRoute("Articles/{slug}")
            {
                Action = "ArticleViewer",
                Model = model,
                Table = "Articles"     
            });

 It is the first route, ScaffoldAllTables = true

ArticleViewer.aspx exists in /DynamicData/CustomPages

 URL I put in my browser:  http://localhost:1549/Articles/xyz

Thanks &  Regards,

 Sam