Problemi estrazione username

[searedone]

buonasera a tutti, spero che tra di voi qualcuno possa darmi una mano
perché non so più dove sbattere la testa ;(

Ho una classe che vi posto due script mi dovrebbero restituire il messaggio con la foto e ok, ma non mi restituisce l'username ma l'id e l'username non mi viene fuori...

Spero davvero che qualcuno mi illumini o mi dica cosa sbaglio .

Classe functions

<?php


class Wall_Updates {


    
     // Updates       
      public function Updates($uid) 
    {
    
    
         $query = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created FROM messages M  WHERE M.uid_fk='$uid' OR M.uid_fk IN  (SELECT u.username FROM users AS u WHERE u.uid = u.uid AND u.uid = u.username )  OR M.uid_fk IN (SELECT user_1 FROM relationship AS r WHERE r.user_2 = '$uid' AND r.amico = 'S')  OR M.uid_fk IN  (SELECT user_2 FROM relationship AS r WHERE r.user_1 = '$uid' AND r.amico = 'S') order by M.msg_id desc  ") or die(mysql_error());     
         while($row=mysql_fetch_array($query))
        $data[]=$row;
        return $data;
        
    }
    //Comments
       public function Comments($msg_id) 
    {
        $query = mysql_query("SELECT C.com_id, C.uid_fk, C.comment, C.created, U.username FROM comments C, users U WHERE C.uid_fk=U.uid and C.msg_id_fk='$msg_id' order by C.com_id asc ") or die(mysql_error());
       while($row=mysql_fetch_array($query))
        $data[]=$row;
        if(!empty($data))
        {
       return $data;
         }
    }
    
    //Avatar Image
    public function Gravatar($uid) 
    {
        $query = mysql_query("SELECT nome_file_vero FROM `users` WHERE uid='$uid'") or die(mysql_error());
       $row=mysql_fetch_array($query);
       if(!empty($row))
       {
        $email=$row['email'];
        $nome_file_vero=$row['nome_file_vero'];
        $lowercase = strtolower(nome_file_vero);
        $nome_file_vero = md5( $lowercase );
        $data="http://www.gravatar.com/avatar.php?gravatar_id=$imagecode";
        return $data;
         }
         else
         {
         $data="default.jpg";
        return $data;
         }
    }
    
    //Insert Update
    public function Insert_Update($uid, $update) 
    {
    $update=htmlentities($update);
       $time=time();
       $ip=$_SERVER['REMOTE_ADDR'];
        $query = mysql_query("SELECT msg_id,message FROM `messages` WHERE uid_fk='$uid' order by msg_id desc limit 1") or die(mysql_error());
        $result = mysql_fetch_array($query);
        
        if ($update!=$result['message']) {
            $query = mysql_query("INSERT INTO `messages` (message, uid_fk, ip,created) VALUES ('$update', '$uid', '$ip','$time')") or die(mysql_error());
            $newquery = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created, U.username FROM messages M, users U where M.uid_fk=U.uid and M.uid_fk='$uid' order by M.msg_id desc limit 1 ");
            $result = mysql_fetch_array($newquery);
             return $result;
        } 
        else
        {
                 return false;
        }
        
       
    }
    
    //Delete update
        public function Delete_Update($uid, $msg_id) 
    {
        $query = mysql_query("DELETE FROM `comments` WHERE msg_id_fk = '$msg_id' ") or die(mysql_error());
        $query = mysql_query("DELETE FROM `messages` WHERE msg_id = '$msg_id' and uid_fk='$uid'") or die(mysql_error());
        return true;
                 
    }
    
    //Insert Comments
    public function Insert_Comment($uid,$msg_id,$comment) 
    {
    $comment=htmlentities($comment);
               $time=time();
       $ip=$_SERVER['REMOTE_ADDR'];
        $query = mysql_query("SELECT com_id,comment FROM `comments` WHERE uid_fk='$uid' and msg_id_fk='$msg_id' order by com_id desc limit 1 ") or die(mysql_error());
        $result = mysql_fetch_array($query);
    
        if ($comment!=$result['comment']) {
            $query = mysql_query("INSERT INTO `comments` (comment, uid_fk,msg_id_fk,ip,created) VALUES ('$comment', '$uid','$msg_id', '$ip','$time')") or die(mysql_error());
            $newquery = mysql_query("SELECT C.com_id, C.uid_fk, C.comment, C.msg_id_fk, C.created, U.username FROM comments C, users U where C.uid_fk=U.uid and C.uid_fk='$uid' and C.msg_id_fk='$msg_id' order by C.com_id desc limit 1 ");
            $result = mysql_fetch_array($newquery);
         
           return $result;
        } 
        else
        {
        return false;
        }
       
    }
    
    //Delete Comments
        public function Delete_Comment($uid, $com_id) 
    {
        $query = mysql_query("DELETE FROM `comments` WHERE uid_fk='$uid' and com_id='$com_id'") or die(mysql_error());
        return true;
                 
    }

    

}

?>

La query incriminata

class Wall_Updates {


    
     // Updates       
      public function Updates($uid) 
    {
    
    
         $query = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created FROM messages M  WHERE M.uid_fk='$uid' OR M.uid_fk IN  (SELECT u.username FROM users AS u WHERE u.uid = u.uid AND u.uid = u.username )  OR M.uid_fk IN (SELECT user_1 FROM relationship AS r WHERE r.user_2 = '$uid' AND r.amico = 'S')  OR M.uid_fk IN  (SELECT user_2 FROM relationship AS r WHERE r.user_1 = '$uid' AND r.amico = 'S') order by M.msg_id desc  ") or die(mysql_error());     
         while($row=mysql_fetch_array($query))
        $data[]=$row;
        return $data;
        
    } 

dove la recupero ..

Messages

<?php

error_reporting(0);
include_once 'includes/db.php';

include_once 'includes/functions2.php';


include_once 'includes/tolink.php';
include_once 'includes/time_stamp.php';
include_once 'session.php';
$Wall = new Wall_Updates();
if(isSet($_POST['update']))
{
$update=$_POST['update'];
$data=$Wall->Insert_Update($uid,$update);

if($data)
{

$uid_fk=$_GET['uid'];
$uid_fk=$_GET['username'];
$msg_id=$data['msg_id'];
$message=tolink(htmlentities($data['message']));
$time=$data['created'];
$username=$data['uid_fk'];
$username=$data['username'];


$nome_file_vero=$data['nome_file_vero'];
$face=$Wall->Gravatar($uid);
//$commentsarray=$Wall->Comments($msg_id);
?>

<div class="stbody" id="stbody<?php echo $msg_id;?>">
<div class="stimg">
[img]<?php echo $face;?>[/img]

</div> 
<div class="sttext">
[url="#"]" title='Delete update'>X[/url]
[b]<?php echo $username ;?>[/b] <?php echo $message;?>


<div class="sttime"><?php time_stamp($time);?> | [url='#']' title='Comment'>Comment [/url]</div> 
<div id="stexpandbox">
<div id="stexpand"></div>
</div>
<div class="commentcontainer" id="commentload<?php echo $msg_id;?>">
<?php// include('load_comments.php') ?>
</div>
<div class="commentupdate" style='display:none' id='commentbox<?php echo $msg_id;?>'>
<div class="stcommentimg">
[img]<?php echo $face;?>[/img]
</div> 
<div class="stcommenttext" >
<form method="post" action="">
<textarea name="comment" class="comment" maxlength="200"  id="ctextarea<?php echo $msg_id;?>"></textarea>


<input type="submit"  value=" Comment "  id="<?php echo $msg_id;?>" class="comment_button"/>
</form>
</div>
</div>
</div> 
</div>
<?php
}
}
?>

load_messages

<?php

foreach($updatesarray as $data)
 {
 $msg_id=$data['msg_id'];
 $orimessage=$data['message'];
 $message=tolink(htmlentities($data['message']));
  $time=$data['created'];
   $username=$data['username'];
 $uid=$data['uid_fk'];
 $username=$data['uid_fk'];
 $face=$Wall->Gravatar($uid);
 $commentsarray=$Wall->Comments($msg_id);
?>

<script type="text/javascript"> 
$(document).ready(function(){$("#stexpand<?php echo $msg_id;?>").oembed("<?php echo  $orimessage; ?>",{maxWidth: 400, maxHeight: 300});});
</script>
<div class="stbody" id="stbody<?php echo $msg_id;?>">

<div class="stimg">
[img]<?php echo $face;?>[/img]
</div> 
<div class="sttext">
[url="#"]" title="Delete update">X[/url]
[b]<?php echo $username;?>[/b] <?php echo $message;?>
<div class="sttime"><?php time_stamp($time);?> | [url='#']' title='Comment'>Comment [/url]</div> 

<div id="stexpandbox">
<div id="stexpand<?php echo $msg_id;?>"></div>
</div>

<div class="commentcontainer" id="commentload<?php echo $msg_id;?>">


<?php include('load_comments.php') ?>





</div>
<div class="commentupdate" style='display:none' id='commentbox<?php echo $msg_id;?>'>
<div class="stcommentimg">
[img]<?php echo $face;?>[/img]
</div> 
<div class="stcommenttext" >
<form method="post" action="">

<textarea name="comment" class="comment" maxlength="200"  id="ctextarea<?php echo $msg_id;?>"></textarea>


<input type="submit"  value=" Comment "  id="<?php echo $msg_id;?>" class="comment_button"/>
</form>


</div>
</div>


</div> 

</div>


<?php

  }
?>