AuthCookie is set, still being redirected to login.aspx

Question

I'm setting up mixed mode authentication in a C# web app. I set the AuthCookie in the WindowsAuthentication website and then try to redirect to the FormsAuthentication website. I think the cookie is in the correct path and everything because Context.Request.IsAuthenticated is true. Unfortunately, I keep getting redirected to the login page of the FormsAuthentication website as if I haven't set the AuthCookie. What is going on?

I'm not familiar with how authentication works in ASP.NET so please, explain it to me like I'm 5. Thanks, :)

edit: Here is the event in the Global.asax of the WindowsAuth site that makes the cookie. This site currently resides in the path /authentication "under" the FormsAuth site.

void Application_PostAuthenticateRequest(Object sender, EventArgs e)
{
    WindowsIdentity ident = WindowsIdentity.GetCurrent();
    WindowsPrincipal p = new WindowsPrincipal(ident);
    if (p.Identity.IsAuthenticated)
    {
        HttpCookie cookie = FormsAuthentication.GetAuthCookie(p.Identity.Name, false);
        FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(cookie.Value);
        // Store roles inside the Forms cookie.
        FormsAuthenticationTicket newTicket = new FormsAuthenticationTicket(
            ticket.Version, ticket.Name, ticket.IssueDate, ticket.Expiration,
            ticket.IsPersistent, "", ticket.CookiePath);
        string encTicket = FormsAuthentication.Encrypt(newTicket);
        Context.Response.Cookies.Add(new HttpCookie(".GWBTroubleTickets", encTicket));
    }
    Response.Redirect("/employee/home.aspx");
}

Answer 1

The event may be called many times per page. - https://stackoverflow.com/a/5947309/57883 You don't have an if/else surrounding the Response.Redirect("/employee/home.aspx");

Try using a custom attribute instead of this event