i have a main web app app.com

setup the dnn cms as virtual dir in it, app.com/cms

I want to route app.com/en-us/home -> asp.com/cms/en-us/home.aspx

 RouteTable.Routes.MapPageRoute("Home - en", "en-us/home", "~/cms/en-us/home.aspx", false);

i keep getting 404 error

explicitly access the page asp.com/cms/en-us/home.aspx work ok.

...

if i create a test page home.aspx in the web app, testing app.com/home -> asp.com/home.aspx

RouteTable.Routes.MapPageRoute("Home 2 - en", "home", "~/home.aspx");

it work. so url routing is ok

what am i missing? or asp.net cannot route to separate/external site page?