Extended Web Application's web.config file

I had an SharePoint Web application at http://intranet and extended it to http://internet. Technically it created a new IIS web site for me with a web.config file completely different from the base web application(i.e. http://intranet).
I had some custom <appSettings > like siteURL in the web.config of the base web application. The extended web application's web.config file doesnt have these <appSettings> , so I copied the base web application's web.config file and replaced it with the extended one's and changed the siteURL key inside <appSettings > to http://internet .
But still , when i browse through the http://internet it shows me the hyperlink pointing to the URL specified in siteURL key for the base web applications web.config i.e http://intranet 

How can i make it to reflect http://internet ??