Cookies se nenastavi

<?
  if($_COOKIE['logincook']=="" && $_COOKIE['passcook']=="")
  {
    if($_POST['prihlasit']=="" or $_POST['heslo']=="")
    {
      echo 
      "
      <center>
      <form method='post'>
      <table>
      <tr>
      <td><center><font size='2'>Login:</font></td>
      </tr>
      <tr>
      <td><input type='text' name='prihlasit'></td>
      </tr>
      <tr>
      <td><center><font size='2'>Password:</font></td>
      </tr>
      <tr>
      <td><input type='password' name='heslo'></td>
      </tr>
      <tr>
      <td><center><input type='submit' value='Přihlásit'></td>
      </tr>
      </table>
      </form>
      ";
    }
    else
    {
      include "connect.php";
      $heslo_sha1=sha1($_POST['heslo']);
      $prihlasit_obyc = $_POST['prihlasit'];
      $user_vyber = MySQL_Query("SELECT * FROM user WHERE login = '$prihlasit_obyc'");
      while ($user_db = MySQL_Fetch_Array($user_vyber))
      {
        if($user_db['login']=="$prihlasit_obyc" && $user_db['heslo']=="$heslo_sha1")
        {
          SetCookie ("passcook", "$heslo_sha1");
          SetCookie ("logincook", "$prihlasit");
          echo "Cookies Set";
        }
        echo "sem se dostanu taky|";
      } 
      echo "sem se dostanu";
    }
  }
  else
  {
    echo "Active";
  }
?>