Can't send cookie and redirect together (php3/IIS)

I'm trying to set a cookie and redirect to a new page. I've tried: setcookie("cookieName",$value,); header ("Location: http://www.foo.com"); It does the redirect, but doesn't set the cookie. If I comment out the redirect, it sets the cookie. If I switch the order of the lines it does the redirect before it ever gets to the cookie line. I tried combining the cookie and the redirect into a single "header()" call, but couldn't find a syntax that works. I know this should be simple, but I can't get it. Any suggestions?