guest online problem

[srecnica]

this is code for guest online .. and it works fine, but I have a problem because we in the online list shows only one (last activity) guest ...

mysql_query("INSERT INTO ibwf_online SET userid=0, actvtime='".time()."', place='guest page',  placedet='".getip()."-".$_SERVER['HTTP_USER_AGENT']."'");

index.php action=online

$sql = "SELECT id,place,userid,placedet,hidden,browserm from ibwf_online WHERE hidden= 0
LIMIT $limit_start, $items_per_page";

$lnk = "$seximg <a href=\"index.php?action=viewuser&amp;who=$item[2]&amp;sid=$sid\">".getnick_uid($item[2])."</a> <br/><b>Status: $status <br/>Trenutno $item[1]</b>";
   if($item[2]==0) {
            
echo "<b>- GUEST  online -IP $item[3]-- Browser $item[5]<br/>Trenutno: $item[1] </b><br/>-----<br/>";
}


else 
{

echo "$lnk<br/><br/>-----<br/>";


}

...What can I do to show all guests online?..help please