note 55176 added to function.setcookie

I have 2 domains and i want to set cookie on a first one, and after to use it on a second one (in fact, there are many domains and subdomains, but i have to set cookie in a one place). I'd tried 2 ways, but seems it's imposible to do this at all.. Is anybody knows?? I. // Setcookie on domain1.ab setcookie("mycook", "something", time()+86400,"\", ".domain2.ab"); // On domain2.ab echo $_COOKIE["mycook"]; -->It doesn't works.. II. // Setcookie on domain1.ab require '/domain2.ab/1.php'; // On domain2.ab, in 1.php setcookie("mycook", "something", time()+86400,"\", ".domain2.ab"); //After on domain2.ab: echo $_COOKIE["mycook"]; -->It doesn't works too. ---- Manual Page -- http://www.php.net/manual/en/function.setcookie.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+55176 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+55176&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+55176&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+55176&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+55176&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+55176&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+55176&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+55176&report=yes Search -- http://master.php.net/manage/user-notes.php