Maybe I didn't state my question clearly. I mean I can't do this when I use $query->header function. However I can't do this when I use $query->redirect function. But from docuementation of CGI model, It seems to me that I can send cookie when I use redirect function. But in reality I can't. As matter of fact I have done the way you mentioned. What I try to do is to use $query->redirect function to send the cookie to the client.