How to Change URL Exrension from .aspx to .html

hi
i m developing a CMS. all pages are driven from database.
I want to change pages extension from .aspx to .html.
For this purpose i m using Global.asax file.(SEE BELOW CODE).

Its working well on localstation

.But when i host my application on web server it give error page not found.

First of all i want that u pls go to following link for better understanding.
http://www.legal-consumer-forum.com/home.aspx

I also want to describe that how it work on local station so that u can better understand of my problem.

when i click on any link on the page suppose (service or about us ) it forward the request to the global.asax.cs and in global.asax.cs file  when i check the first line of code . i found

strCurrenturl=http://localhost:2234/service.html

after that  it rewrite the url  here and  redirect the page to "~/LINKS.aspx
Now i m seeing  output in which the url   is  http://localhost:2234/service.html    and page contents are  of link.aspx.
The Same thing i want.

MY problem is that after host this web application on server if i m requesting  http://www.legal-consumer-forum.com/service.aspx then IIS compiling the global.asax.cs n its work fine.
BUT  IIS not compiling  the Global.asax.cs when i request for  http://www.legal-consumer-forum.com/service.html.
it search http://www.legal-consumer-forum.com/service.html directly in the root directory and it not found service.html and it is showing PAGE NOT FOUND.

If it will complile the Global.asax.cs then my code will work.
I have also mapped .html extension to aspnet_isapi.dll in IIS Manager
I want that when i request service.html it will compile the global.asax.cs


Any Help,suggestion for solving this problem will be Highly Appriciated.

THanks
sidharth

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protected void Application_BeginRequest(object sender, EventArgs e)
        {
            string strCurrenturl = Request.Url.ToString();
            strCurrentPath = Request.Path.ToLower();
 
 
            if (strCurrentPath.EndsWith(".aspx") || strCurrentPath.EndsWith(".html") || strCurrentPath.EndsWith(".htm"))
            {
                strCustomPath = "";
                strCustomPath = "~/LINKS.aspx?transfer=" + strCurrenturl;
                Context.RewritePath(strCustomPath, false);
            }
           
        }