VS-Exec without debugging give the content of my .asmx file in the navigator :(

Hi everybody,

I am trying to execute a Web Service file in ASP.NET with Visual Studio 2005, Professionnal Edition and it doesn't work. The Ctrl +F5 gives the content of the .asmx file in the navigator. 

<%@ WebService Language="C#" CodeBehind="MyDirectory/AppCode/MyFile.cs" Class="MyClass" %>

I really neeed some help :(

I have to mention that i am using Windows 8 so, IIS 8.0 gaves me a lot of trouble and i tried my best to configure it with support of .Net 2.0 (Activate .net 3.5, add script mapping Handlers for *.soap, *.aspx, *.asmx, change the permissions to be able to run\debug it in machine.config etc..). 

Sorry if my english is not very good and thank you for your help :)