Default Request.Cookie["Proxy"] get created if Visual Studio 2010 open as administrator

HI All,

I am working on visual studio 2010 express edition.

I have one application developed in VC# MVC3 architecture.

I used form authentication and when user login into application I store some usefull infomration like user fullname its user id in cookies.

Below code to add cookies.

FormsAuthentication.SetAuthCookie(model.UserName, true);

FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1,
user.UserName,
DateTime.Now,
DateTime.Now.AddMinutes(60),
isPersistent,
user.FullName + "|" + user.UserId,
FormsAuthentication.FormsCookiePath);

string encTicket = FormsAuthentication.Encrypt(ticket);

// Create the cookie.
Response.Cookies.Add(new HttpCookie(FormsAuthentication.FormsCookieName, encTicket));

I am retriving same cookie info using below code.

FormsAuthentication.Decrypt(Request.Cookies[0].Value).UserData;

 Code is working fine.

BUT if I open VS 2010 as Administrator and try to run above appliction behaviour is different

1) Request.Coookie[0] already exist (Proxy) and it store URL information.

2) When my code create cookies it set as second cookies.

So FormsAuthentication.Decrypt(Request.Cookies[0].Value).UserData; throw exception. 

I can fatch cookie by cookie name but I just wanted to know why this proxy cookie get created only if I open VS 2010 as administrator.

Appreciate for your time and response.

Thanks,