Unable to delete cookies

[bungpeng]

The code is simple and it work fine in my development machine.

But when I upload to hosting server,

then unable to clear the cookies.

 

Dim obj As HttpCookie = Request.Cookies("aaa")

If Not obj Is Nothing Then
  obj.Expires = DateTime.Now.AddDays(-7)
  Response.Cookies.Add(obj)
End If

 

Any posibility of it?

I really can't understand. Will the OS setting affect it?