I have a logon screen and main menu stored in the separate folder on dev server. When I login, I create a cookie for the user id to use it in the entire system, and I can read this cookie from the mainmenu. As soon as I click the link that should connect me to the system with the files stored in another folder, my cookie is lost. Request.Cookies returns an empty string. I never had this issue before, and I don't have it in production, but I cannot find the difference between production and development. Your ideas are greatly appreciated.