使用IIS 7进行城堡MonoRail路由？

I’m trying to make the routing module works with default action or controller, but it doesn’t. I always face with 404 page not found. Did I forget to do something? I really like routing in ASP.NET MVC feature, but I’m not sure I could do the same in MR. I’m using IIS7 with the build from castle trunk for .NET 3.5.I’m trying to make the routing module works wit