User lists does not appear when entering chat from same sess

[lexis]

I have link from main page to phpfreechat page. Phpfreechat is opening in the popup window. When I open chat first time, it looks good. If I close chat window and open chat again from the same PHP session it does not load user list and chat text . If I do logoff (destroy PHP session) and re-enter, it works well.

$params["serverid"] = md5("moderators");
$params["language"] = "fr_FR";
$params["title"] = "Tchat GM";
$params["theme"] = "green";
$params["frozen_nick"] = true;
$params["showsmileys"] = false;
$params["height"] = "300px";
$params["shownotice"] = 0;

$params["channels"] = array("Salle");
$params["frozen_channels"] = array("Salle");

$params["refresh_delay"] = 5000;
$params["admins"] = array("alex");
$params["nick"] = $current_user->nick;
if($params["nick"] == "alex") $params["isadmin"] = true;

$params["proxys"] = array("lock", "auth", "noflood");
$params["proxys_cfg"] = array(
"auth" => array(),
"noflood" => array("limit"=>10,"delay"=>5),
);

$chat = new phpFreeChat($params);