How do I distinguish between these 2 MVC routes?

I have these routes in my area registration. It seems the second route is giving me resource Not found error.

            context.MapRoute(
                "viewer",
                "forum/{id}",
                new { controller = "View", action = "Index" }
            );

            context.MapRoute(
                "contacts",
                "forum/contacts",
                new { controller = "Contacts", action = "Index" }
            );

        context.MapRoute(
            "app_home",
            "forum/",
            new { controller = "Home", action = "Index" }
        );

It seems the first route is blocking the urls for the second one. The action's controllers are different: Test and Contacts.

Sample url for first route:

www.<mysite>/forum/12345  <-- view fo开发者_StackOverflowrum 12345

Sample url for second route:

www.<mysite>/forum/contacts  <-- view contacts homepage

Sample url for third route:

www.<mysite>/forum  <-- forum homepage

How can I make these urls distinct in the routes?

Put the contacts route first.

Routes are ordered; the routing engine will always select the first matching route.
Therefore, you should always put the most specific routes first.