Error 404.17 opening *.asmx page

Symptoms:

You have an application working with IIS 7 and .Net Framework 1.1.
When you browse a .asmx page you get error 404.17 :

HTTP Error 404.17 - Not FoundThe requested content appears to be script and will not be served by thestatic file handler.

Problem:
The site is not propely configured to handle Asp.Net extensions.

Solution:
In IIS Manager click on the problematic site.
Under "Handler Mappings" find the association for the asmx extesion.
If it is missing you can force inheritance from the father site or server by clicking "Restore Inheritance". Now, if you can see the mapping with the correct .net dll (verify the path to the right framework folder) th page should be correctly opened.
If not, invesigate the parent's Mappings.


(Mago.Net Fails to register with 1090.0 error)