note 11534 added to setcookie

i try to use this function to prevent that the same visitor vote for more than one time in a hour bur it don't work, the code is this: if($vote!=1) { $time=time(); $time=$time + 36000; setcookie("vote","1",$time); } If the visitor vote, the vote counts, than if it try to vote again the vote don't count, but if he try again it counts, the cookie is delete and i don't know why, i use IE 5.5. Can some one help me. http://www.php.net/manual/en/function.setcookie.php