ASP.Net HttpCookie expiration set to two years

Question

I create a cookie and set the Expires property to 24 hours, but in IE the expiration is set to two years. In Firefox it is set correctly. Why?

My code:

//Set a cookie to expire in 24 hours.
HttpCookie clickCookie = new HttpCookie(adId, adId);
clickCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(clickCookie);

Thanks

Answer 1

This does not seem to be possible. Can you try again after erasing current cookies of IE?

Answer 2

What happens if you do:

clientCookie.Expires = DateTime.Now.AddHours(24);