CORRECTION: Problem with cookies

Oops, messed up the cut'n'paste... Hi all - I am having a problem with cookies. It seems that if I set the domain field in setcookie, nothing happens. I also tried creating the cookie header manually, with the same results. This is what I have:

    $expireTime = time();
    $expireTime += ($daysToExpire * 86400);

    setcookie("Test1", "Thistest");
    setcookie("Test2", "Thistest", $expireTime);
    setcookie("Test3", "Thistest", $expireTime, "/");
    setcookie("Test4", "Thistest", $expireTime, "/", "");
    setcookie("Test5", "Thistest", $expireTime, "/", ".mydomain.com.");

    $COOKIE  = "Set-Cookie: $cookieName=$cookieValue";
    $COOKIE .= "; expires=" .
               gmdate("D, d-M-Y H:i:s", $expireTime) . " GMT ";
    $COOKIE .= "; path=/";
    $COOKIE .= "; domain=.mydomain.com.;
    header ($COOKIE, false);

When I run this page in my browser, I get asked if I want to allow cookies Test1 through Test4, but not Test5 and Test6 - they just don't get written. I have a perl script that does the same thing as the manual version, I have matched up character-by-character the string in $COOKIE with what is printed out by perl, but the perl works and the php doesn't. Any clues? thanks, andy