Setting Cookie.Expires

[Joe]

I'm trying to set the Expires property of a cookie in a control by doing the
following:
this.Context.Re sponse.Cookies["mycookie"].Expires =
DateTime.Today. AddDays(1);

But when I refresh the page and check the same
this.Context.Re sponse.Cookies["mycookie"].Expires it has the default date
1/1/0001.

Any idea what I'm doing wrong?

Thanks,
Joe