ASP.NET MVC, Custom VirtualPathProvider and IIS6

I have implemented my own VirtualPathProvider for loading 'embedded' views.

This works very well when running from Visual Studio, but I get the 'The view not found' message when running on IIS6.

Is there anything missing in web.config, or could there be any other problem?

I have added some logging and it seems that even though I register the Custom VirtualPathProvider in Application_Start, the System.Web.Hosting.MapPathBasedVirtualPathProvider is still used.

Solution

For the combination Custom VPP + IIS6 + Precompiled site, we need to add the VPP from AppInitailize();

public static class AppStart
{
    public static void
    {
    // code to be executed automatically by the framework
    }
}