MVC :: GetJson Not Called In A Web Application?

I am trying to make my ASP.NET MVC 2 application working from a test server.

Since I am using IIS 6 in my test server, I have to define in the Global.asax.cs file:

routes.MapRoute(
"Default", // Route name
===> "{controller}.aspx/{action}/{id}", // URL with parameters
new
{
controller = "Home",
action = "Index",
id = UrlParameter.Optional
} // Parameter defaults
);

This complicates the correct definition of the URL in my getJson() calls for my site production version.

When running my site from the test server, I found using Fiddler that the URL reguested by the browser

for getJson() calls is:

/Controller.aspx/Controller Method

which is correct, but probably, not the complete necessary path for getJson() to work.

I think that this is the reason for getJson() calls to give "Page Not Found(404)" in Fiddler and a syntax error in FireBug and to be skipped completely when trying to execute. Of my understanding the complete path should be:

/My Site/Controller.aspx/Controller Method

I use jQuery 1.4.2.